Sound brief assessment of warm weather (7)
I believe the answer is:
summery
'assessment of warm weather' is the definition.
Both the answer and definition are adjectives. Perhaps you can see a link between them that I don't see?
'sound brief' is the wordplay.
'sound' indicates a 'sounds like' (homophone) clue.
'brief' becomes 'summary' (I've seen this before).
'summary' sounds like 'SUMMERY'.
Can you help me to learn more?
(Other definitions for summery that I've seen before include "of the season" , "Like August, say" , "Hot" , "concerning part of the year" , "Of June, July or August (most years)" .)