Win back in rain for example (6)
I believe the answer is:
regain
'win back' is the definition.
(to win or capture again)
'in rain for example' is the wordplay.
'in' means one lot of letters goes inside another.
'for example' becomes 'eg' (short for 'exempli gratia', 'for example' in Latin).
'rain' enclosing 'eg' is 'REGAIN'.
(Other definitions for regain that I've seen before include "Take back (the Ashes, for example)" , "Get back (previously owned object)" , "Recover, retrieve" , "Win back" , "Get back, recover the use of" .)