Anklang finden
to be well received
To be received positively; to meet with approval, interest, or favor from others.
Sein Vorschlag fand bei den Kollegen großen Anklang.
His proposal was very well received by his colleagues.

resonance / echo
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to be well received
To be received positively; to meet with approval, interest, or favor from others.
Sein Vorschlag fand bei den Kollegen großen Anklang.
His proposal was very well received by his colleagues.

'Der Anklang' is the noun related to the verb 'anklingen' and is related to 'der Klang' (the sound). The basic idea is that something 'anklingt' with someone (triggers a response) or 'anklingt' to something else (is reminiscent of it).
In seiner Kritik ließ der Professor anklingen, dass er nicht zufrieden war.
In his criticism, the professor hinted that he was not satisfied.
In the meaning 'positive reception', 'Anklang' is used almost exclusively in the fixed expression 'Anklang finden' (to be well received). It is best to learn this as one unit.
Die Idee, ein Sommerfest zu veranstalten, fand sofort Anklang.
The idea of holding a summer party was immediately well received.
The expression 'Anklang finden' is often combined with adjectives to describe the degree of approval. Common phrases include finding 'großen' (great), 'breiten' (broad), 'positiven' (positive), or also 'wenig' (little) and 'keinen' (no) Anklang.
Die neue Kollektion fand bei den Kunden nur wenig Anklang.
The new collection was only poorly received by customers.
In the meaning 'Andeutung' (suggestion) or 'Ähnlichkeit' (similarity), 'Anklang' often appears with the preposition 'an' followed by the accusative. It describes a stylistic or content-related similarity, usually in art or music.
Die Melodie hat deutliche Anklänge an ein altes Volkslied.
The melody has clear echoes of an old folk song.
track / trace
'die Spur' and 'der Anklang' can both express a slight hint or a weak similarity. 'eine Spur von etwas' (a trace of something) is more general and simply means that something is present only in a very small amount. 'ein Anklang an etwas' is often used when something is reminiscent of something else, for example a style, a taste, or music. 'Spur' emphasizes the small amount, while 'Anklang' emphasizes the similarity or reminder of something.

Das neue Lied hat einen leichten Anklang an alte Volksmusik.
The new song has a slight echo of old folk music.
In der Suppe war nur eine Spur von Knoblauch zu schmecken.
There was only a trace of garlic to taste in the soup.