Smoke with heart-throb in bed (7)
I believe the answer is:
cheroot
'smoke' is the definition.
(type of cigar)
'heart-throb in bed' is the wordplay.
'heart-throb' becomes 'hero'.
'in' indicates putting letters inside.
'bed' becomes 'cot' (cot is a kind of bed).
'hero' put within 'cot' is 'CHEROOT'.
'with' acts as a link.
(Other definitions for cheroot that I've seen before include "Cigar cut at both ends" , "Small cigar" , "With both ends cut off squarely, is smoked" , "Variety of cigar" , "Cigar with open ends - hot core (anag)" .)