Bright and blustery at first, then wet (6)
I believe the answer is:
brainy
'bright' is the definition.
(both can mean intelligent)
'blustery at first then wet' is the wordplay.
'blustery' becomes 'b' (this might be a standard abbreviation of which I'm unaware).
'at first then' is a charade indicator (letters next to each other).
'wet' becomes 'rainy' (similar in meaning).
'b'+'rainy'='BRAINY'
'and' acts as a link.
Can you help me to learn more?
(Other definitions for brainy that I've seen before include "Clever, got lots of grey matter" , "Highly intelligent" , "Bright" , "Binary (anag.)" , "Showing intelligence" .)