Noblemen make love in sheds (6)
I believe the answer is:
barons
'noblemen' is the definition.
(baron is a kind of nobleman)
'love in sheds' is the wordplay.
'love' becomes 'o' (love means zero in tennis).
'in' is an insertion indicator.
'sheds' becomes 'barns' (I've seen this before).
'o' put inside 'barns' is 'BARONS'.
'make' is the link.
(Other definitions for barons that I've seen before include "Low-ranking British peers" , "No bars for the British peers" , "Lords" .)