Get back to wet weather, say, inside (6)
I believe the answer is:
regain
'get back' is the definition.
(I've seen this before)
'wet weather say inside' is the wordplay.
'wet weather' becomes 'rain' (rain is wet weather).
'say' becomes 'eg' (both can mean for example).
'inside' means one lot of letters goes inside another.
'rain' going around 'eg' is 'REGAIN'.
'to' is the link.
(Other definitions for regain that I've seen before include "Take back (the Ashes, for example)" , "Recover, retrieve" , "Get back (previously owned object)" , "Recover - in gear (anag)" , "Get back, recover the use of" .)