After turning over, make love with boss (4)
I believe the answer is:
knob
'boss' is the definition.
(I know that boss can be written as knob)
'after turning over make love' is the wordplay.
'after turning over' shows that the letters should be reversed in order.
'make love' becomes 'bonk' (synonyms).
'bonk' in reverse letter order is 'KNOB'.
'with' is the link.
(Other definitions for knob that I've seen before include "Ball" , "hard swelling" , "Rounded projection" , "Rounded handle" , "Small lump (of butter?)" .)