Value a quiet compliment (8)
I believe the answer is:
appraise
'value' is the definition.
(synonyms)
'a quiet compliment' is the wordplay.
'quiet' becomes 'p' (music symbol for 'piano', ie soft or quiet).
'compliment' becomes 'praise' (I've seen this in another clue).
'a'+'p'+'praise'='APPRAISE'
(Other definitions for appraise that I've seen before include "Assess value of (something)" , "Estimate or assess the value of" , "Appears I have to assess the value of" , "Judge" , "Make assessment of value or quality" .)