People often found in The Den ogling wingers? (9)

I believe the answer is:

twitchers

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

'people often' is the definition.
'twitchers' can be an answer for 'people' (I have seen 'unsettled people' mean 'twitchers' so perhaps 'people' could also mean 'twitchers'). I'm not certain of the 'often' bit.

I cannot understand how the rest of the clue works.

Can you help me to learn more?

(Other definitions for twitchers that I've seen before include "unsettled people" , "Naturalists" .)

I've seen this clue in The Independent.

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