The officer spoils Henry (7)
I believe the answer is:
marshal
'the officer' is the definition.
(I've seen this before)
'spoils henry' is the wordplay.
'spoils' becomes 'mars' ('mar' can be a synonym of 'spoil').
'henry' becomes 'hal' (short for Henry).
'mars'+'hal'='MARSHAL'
(Other definitions for marshal that I've seen before include "Usher" , "US law officer" , "Assemble and arrange" , "Muster" , "Event supervisor" .)