Rants occasionally with policy to go for (6)
I believe the answer is:
attack
'go for' is the definition.
(go for can mean to attack suddenly)
'rants occasionally with policy' is the wordplay.
'occasionally' indicates alternate letters.
'with' means one lot of letters go next to another.
'policy' becomes 'tack' (as in the phrase 'changing tack').
The alternate letters of 'rants' are 'at'.
'at'+'tack'='ATTACK'
'to' is the link.
(Other definitions for attack that I've seen before include "mount an offensive" , "attempt at seizure" , "Fiercely criticise" , "Invade; vilify" , "Pitch into" .)