He hates arranging cover (7)
I believe the answer is:
sheathe
'cover' is the definition.
(sheathing is a kind of covering)
'he hates arranging' is the wordplay.
'arranging' indicates anagramming the letters.
'he'+'hates'='hehates'
'hehates' is an anagram of 'SHEATHE'.
(Other definitions for sheathe that I've seen before include "Protective cover, for sword say" , "Put (a sword) it its cover" , "Cover in case" , "Put (a sword) into case" , "stow away safely" .)