Turn back concerning gale (6)
I believe the answer is:
rewind
'turn back' is the definition.
(I've seen this before)
'concerning gale' is the wordplay.
'concerning' becomes 're' (both can mean on a particular topic).
'gale' becomes 'wind' (I've seen this in other clues).
're'+'wind'='REWIND'
(Other definitions for rewind that I've seen before include "Turn (a tape) backwards" , "Turn back a film or tape" , "Operate tape" , "Return to start of film" , "Turn back (eg, tape)" .)