Frenzied gunners get command (5)
I believe the answer is:
rabid
'frenzied' is the definition.
(I've seen this before)
'gunners get command' is the wordplay.
'gunners' becomes 'ra' (Royal Artillery).
'get' says to put letters next to each other.
'command' becomes 'bid' ('bid' can be a synonym of 'command').
'ra'+'bid'='RABID'
(Other definitions for rabid that I've seen before include "Mad; raging" , "Burning" , "Fanatical - hydrophobic" , "Furious like mad dog?" , "Mad like deranged dog" .)