Leaves for smoking given to graduate, cold, with company (7)
I believe the answer is:
tobacco
'leaves for smoking' is the definition.
(I've seen this before)
'to graduate cold with company' is the wordplay.
'graduate' becomes 'BA' (someone with a Bachelor of Arts degree).
'cold' becomes 'C' (eg on taps).
'with' is a charade indicator (letters next to each other).
'company' becomes 'co' (abbreviation).
'to'+'ba'+'c'+'co'='TOBACCO'
'given' is the link.
(Other definitions for tobacco that I've seen before include "Pipe leaves" , "Dangerous plant" , "Plant associated with serious health risks" , "Snuff, for example" , "Leaves prepared for smoking" .)