They help make the inner man happiest! (4)

I believe the answer is:

pies

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'they help make' is the definition.
The definition suggests an adverb but the answer is not.

'inner man happiest' is the wordplay.
'inner' says the answer is hidden in the clue (I've seen 'In' mean this).
'PIES' can be found hidden inside 'man happiest'.

'the' is the link.

Can you help me to learn more?

(Other definitions for pies that I've seen before include "Pastry-topped puddings" , "Dishes baked in pastry-lining" , "Pastry dishes" , "food" , "See 1 Across" .)

I've seen this clue in the Evening Standard.

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