Appraisal Nutmeg's given in online post? (10)
I believe the answer is:
estimation
'appraisal' is the definition.
('estimation' can be a synonym of 'appraisal')
'nutmeg's given in online post?' is the wordplay.
I cannot quite understand how this works, but
'online' could be 'on' ('on' can be similar in meaning to 'online') and 'on' is found in the answer.
This explanation may well be incorrect...
Can you help me to learn more?
(Other definitions for estimation that I've seen before include "View" , "Reckoning of value" , "Judgment" , "Guess" , "Opinion" .)