Stops for breath at last, maybe (5)
I believe the answer is:
halts
'stops' is the definition.
(I know this)
'for breath at last maybe' is the wordplay.
'for breath' becomes 'h' (I am not sure about this - if you are sure you should believe this answer much more).
'at' is a charade indicator (letters next to each other).
'maybe' indicates an anagram.
'last' is an anagram of 'alts'.
'h'+'alts'='HALTS'
Can you help me to learn more?
(Other definitions for halts that I've seen before include "Stops moving or progress" , "Brings to an end" .)