Show ill disposition, beset by enemies (7)
I believe the answer is:
follies
'show' is the definition.
(follies is a kind of show)
'ill disposition beset by enemies' is the wordplay.
'disposition' is an anagram indicator.
'beset by' is an insertion indicator ('beset' could historically mean 'cover').
'enemies' becomes 'foes' (I've seen this before).
'ill' is an anagram of 'lli'.
'lli' going inside 'foes' is 'FOLLIES'.
(Other definitions for follies that I've seen before include "Rash actions" , "Ornamental buildings with no practical purpose" , "Idiocies" , "Silly acts or ornamental buildings" .)