Estimate value with a quiet and warm approval (8)
I believe the answer is:
appraise
'estimate value' is the definition.
'appraise' can be an answer for 'value' (I've seen this before). I'm not sure about the 'estimate' bit.
'a quiet and warm approval' is the wordplay.
'quiet' becomes 'p' (music symbol for 'piano', ie soft or quiet).
'and' is a charade indicator (letters next to each other).
'warm approval' becomes 'praise' (I've seen this before).
'a'+'p'+'praise'='APPRAISE'
'with' is the link.
Can you help me to learn more?
(Other definitions for appraise that I've seen before include "Estimate (worth) - assess (performance)" , "survey?" , "Assess or evaluate" , "Assess, set a price on" , "Estimate or assess the value of" .)