Feature of lunch indeed (4)
I believe the answer is:
chin
'feature' is the definition.
(facial feature)
'of lunch indeed' is the wordplay.
'of' indicates the answer is hidden within the clue.
'CHIN' can be found hidden inside 'lunch indeed'.
(Other definitions for chin that I've seen before include "Prominent feature" , "Feature of face" , "Facial feature" , "hit" , "Inch (anag.)" .)