English duets performing compositions (6)
I believe the answer is:
etudes
'compositions' is the definition.
(I know this)
'english duets performing' is the wordplay.
'english' becomes 'E' (abbreviation).
'performing' is an anagram indicator (the letters move around or 'perform').
'duets' is an anagram of 'tudes'.
'e'+'tudes'='ETUDES'
(Other definitions for etudes that I've seen before include "Musical compositions (French)" , "Musical exercises (Fr.)" , "Short compositions for solo instruments" , "Sue Ted over short musical compositions" , "Short pieces for solo instruments to show talent" .)