Wind incorporated side to side in a kind of valve (7)
I believe the answer is:
mistral
'wind incorporated side' is the definition.
'mistral' can be an answer for 'wind' (I've seen this before). I'm not sure about the 'incorporated side' bit.
'side in a kind of valve' is the wordplay.
'side' becomes 's' (this could be a standard abbreviation which I don't know about).
'in' means one lot of letters goes inside another.
'a kind of valve' becomes 'mitral'.
's' inserted into 'mitral' is 'MISTRAL'.
'to' is the link.
Can you help me to learn more?
(Other definitions for mistral that I've seen before include "That's a blow" , "French wind" , "Nice chiller" , "A harsh blow" , "Strong north wind of southern France" .)