Remedy may be to change gear (7)
I believe the answer is:
redress
'remedy' is the definition.
(I know that remedy can be written as redress)
'to change gear' is the wordplay.
'to change' becomes 're' (I can't explain this - if you can you should believe this answer much more).
'gear' becomes 'dress' (both can mean clothing).
're'+'dress'='REDRESS'
'may be' acts as a link.
Can you help me to learn more?
(Other definitions for redress that I've seen before include "Put right" , "Reparation" , "Set right - compensation" , "remedy" , "Make amends for" .)