Get better band together? (5)

I believe the answer is:
rally
'get better' is the definition.
(I've seen this before)
'band together?' is the wordplay.
I cannot really see how this works, but
'band together?' could be 'ally' (I've seen this in another clue) and 'ally' is found in the answer.
A single letter 'r' remains which might be clued in a way I don't see.
This may be the basis of the clue (or it may be nonsense).
Can you help me to learn more?
(Other definitions for rally that I've seen before include "Bring together for a purpose, troops perhaps" , "Recover strength after illness" , "Get better; car meet" , "Mass meeting -- revive" , "Arouse for action" .)
