Officer gets clean away, bodily (5,8)
I believe the answer is:
lance corporal
'officer' is the definition.
(lance corporal is a kind of officer)
'clean away bodily' is the wordplay.
'away' is an anagram indicator (letters move away from their original places).
'bodily' becomes 'corporal' (synonyms).
'clean' is an anagram of 'lance'.
'lance'+'corporal'='LANCE-CORPORAL'
'gets' acts as a link.
(Other definitions for lance corporal that I've seen before include "Junior NCO in the British Army" , "Soldier" , "Army rank" , "NCO rank" .)