Help in making out with good girls (7)
I believe the answer is:
glasses
'help in making out' is the definition.
(I've seen this before)
'good girls' is the wordplay.
'good' becomes 'g' (abbreviation).
'girls' becomes 'lasses' (lass is a kind of girl).
'g'+'lasses'='GLASSES'
'with' acts as a link.
(Other definitions for glasses that I've seen before include "Specs" , "are they full of alcohol?" , "Spectacles; schooners" , "Drinks" , "Spectacles and receptacles" .)