Reportedly look for join (4)
I believe the answer is:
seam
'join' is the definition.
(seaming is a kind of joining)
'reportedly look' is the wordplay.
'reportedly' shows a homophone (sound like).
'look' becomes 'seem' ('seem' can be a synonym of 'look').
'seem' is a homophone of 'SEAM'.
'for' is the link.
(Other definitions for seam that I've seen before include "Join - thin layer" , "Line of sewing - stratum of coal" , "Fabric join" , "Sewing join" , "Stratum (of a mineral)" .)