Knit piece around front of pullover (6)
I believe the answer is:
splice
'knit' is the definition.
(I've seen this before)
'piece around front of pullover' is the wordplay.
'piece' becomes 'slice' (slice is a kind of piece**).
'around' is an insertion indicator.
'front of' says to take the initial letters.
The first letter of 'pullover' is 'p'.
'slice' going around 'p' is 'SPLICE'.
(Other definitions for splice that I've seen before include "Join pieces of rope by interweaving loose ends" , "Join (ropes) by interweaving strands" , "Join the ends by weaving the strands together" , "Unite (strands of rope)" , "Join the ends of, rope say" .)