To get back, you need to restore strength (7)

I believe the answer is:

recover

I'm a little stuck... Click here to teach me more about this clue!

'to get back' is the definition.
(I've seen this before)

I cannot understand how the rest of the clue works.

(Other definitions for recover that I've seen before include "Obtain the return of" , "Get better - get back" , "Get well again" , "Rescue" , "comeback" .)

I've seen this clue in the Evening Standard.

Want a hint initially instead of a full solution? Install my app