Brought round again, gunners tired, needing energy to rise (10)
I believe the answer is:
reawakened
'brought round again' is the definition.
(to bring someone round is to wake them up)
'gunners tired needing energy to rise' is the wordplay.
I cannot quite understand how this works, but
'energy' could be 'ke' (K.E. is an example) and 'ke' is located in the answer.
This explanation may well be incorrect...
(Other definitions for reawakened that I've seen before include "Revived" , "stirred up afresh" , "Roused again" .)