Fellow accepts sweetheart with hesitation? It's not so dear (7)
I believe the answer is:
cheaper
'not so dear' is the definition.
(I've seen this before)
'fellow accepts sweetheart with hesitation?' is the wordplay.
'fellow' becomes 'chap' (both can mean a man).
'accepts' indicates putting letters inside.
'sweetheart' becomes 'e' (the heart/centre of 'sweet').
'with' is a charade indicator (letters next to each other).
'hesitation?' becomes 'er' (sound used when hesitating).
'chap' enclosing 'e' is 'cheap'.
'cheap'+'er'='CHEAPER'
'it's' is the link.
(Other definitions for cheaper that I've seen before include "less in cost" , "Less extravagant" , "Less costly" , "causing less damage" , "Comparatively despicable" .)