Exposed features good for jab (5)
I believe the answer is:
nudge
'for jab' is the definition.
(thesaurus)
'exposed features good' is the wordplay.
'exposed' becomes 'nude' (not wearing any clothes).
'features' is an insertion indicator.
'good' becomes 'g' (abbreviation).
'nude' placed around 'g' is 'NUDGE'.
(Other definitions for nudge that I've seen before include "Push (with a wink?)" , "Jostle" , "Gentle poke with elbow" , "---. ---, wink, wink (Monty Python)" , "Slight push" .)