Crossword Genius

Flap less than the whole wing (3)

Ross

I believe the answer is:

tab

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

This clue could be a double definition.

'flap less than' is the first definition.
'tab' can be an answer for 'flap' (both can mean a small piece of material). I'm not certain of the 'less than' bit.

'whole wing' is the second definition.
'tab' can be an answer for 'wing' (thesaurus). I am not certain of the 'whole' bit.

'the' is the link.

Can you help me to learn more?

(Other definitions for tab that I've seen before include "Bar tally; small flap" , "Marker" , "Till bill" , "Ring pull" , "ticket" .)

I've seen this clue in the Evening Standard.
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