Mope about elegy (4)
I believe the answer is:
poem
'elegy' is the definition.
(thesaurus)
'mope about' is the wordplay.
'about' indicates an anagram.
'mope' with letters rearranged gives 'POEM'.
(Other definitions for poem that I've seen before include "Piece of verse" , "Ode" , "Literary composition, sometimes in verse" , "Mope (anag.)" , "Mope about in verse" .)