Kind offer he'd rate poorly (6-7)
I believe the answer is:
tender-hearted
'kind' is the definition.
(I've seen this before)
'offer he'd rate poorly' is the wordplay.
'offer' becomes 'tender' (tender can mean to offer something).
'poorly' indicates an anagram (a poor spelling).
'hed'+'rate'='hedrate'
'hedrate' is an anagram of 'hearted'.
'tender'+'hearted'='TENDER-HEARTED'
(Other definitions for tender-hearted that I've seen before include "Kind" , "Gentle, sentimental" , "Compassionate" .)