Former wife's describing skill returning accessories (6)
I believe the answer is:
extras
'accessories' is the definition.
(I've seen this before)
'former wife's describing skill returning' is the wordplay.
'former wife's' becomes 'ex's' (an ex-wife).
'describing' means one lot of letters goes inside another (describe can mean to form the outline of).
'skill' becomes 'art' (both can mean a talent).
'returning' says the letters should be written backwards.
'art' in reverse letter order is 'tra'.
'exs' enclosing 'tra' is 'EXTRAS'.
(Other definitions for extras that I've seen before include "Minor film actors" , "Sundries" , "Actors hired for crowd scenes" , "walk-on parts" , "Runs not scored from the bat" .)