No catches in these musical pieces (6)
I believe the answer is:
nonets
'these musical pieces' is the definition.
(I've seen this before)
'no catches' is the wordplay.
'catches' becomes 'nets' (netting is a kind of catching).
'no'+'nets'='NONETS'
'in' is the link.
(Other definitions for nonets that I've seen before include "Compositions for nine players" , "musical pieces" , "Groups of nine musicians" , "Pieces of music for groups of nine" , "Compositions for nine performers" .)