Gift men put in it leads to suspicion (12)
I believe the answer is:
presentiment
'suspicion' is the definition.
(thesaurus)
'gift men put in it' is the wordplay.
'gift' becomes 'present' (present is a kind of gift).
'put in' means one lot of letters goes inside another.
'men' placed within 'it' is 'iment'.
'present'+'iment'='PRESENTIMENT'
'leads to' is the link.
(Other definitions for presentiment that I've seen before include "bad feeling" , "An intuitive feeling" , "Feeling of apprehension" , "Intuitive foreboding" .)