A recent survey revealed hundreds of them! (5)

I believe the answer is:

cents

I'm a little stuck... Click here to teach me more about this clue!

'hundreds of them' is the definition.
I can't judge whether this defines the answer.

'a recent survey revealed' is the wordplay.
'revealed' indicates a hidden word (I've seen 'revealing' mean this).
'CENTS' is hidden in the letters of 'recent survey'.

Can you help me to learn more?

(Other definitions for cents that I've seen before include "money abroad" , "Hundredths of dollar" , "Fractions of dollar" , "American coins" , "US money, e.g." .)

I've seen this clue in the Evening Standard.

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