It prevents wear in lower sensitive region, reportedly (6)
I believe the answer is:
groyne
'it prevents wear in lower sensitive' is the definition.
The definition suggests a singular noun which matches the answer.
'region reportedly' is the wordplay.
'region' becomes 'groin' (groin is a kind of region).
'reportedly' shows a homophone (sound like).
'groin' is a homophone of 'GROYNE'.
Can you help me to learn more?
(Other definitions for groyne that I've seen before include "Seaside feature" , "A bulwark" , "Beach breakwater" , "Beach-protecting wall" , "Barrier built on beach" .)