Heed explanation and see sense (6,2,6)
I believe the answer is:
listen to reason
'see sense' is the definition.
(I've seen this before)
'heed explanation' is the wordplay.
'heed' becomes 'listen to' (synonyms).
'explanation' becomes 'reason' (reason is a kind of explanation).
'listento'+'reason'='LISTEN TO REASON'
'and' is the link.
(Other definitions for listen to reason that I've seen before include "prepared to do this" , "See sense" , "Be gently persuaded" , "Be persuaded to act sensibly" , "respond logically" .)