Bitty compositions? (6)
I believe the answer is:
pieces
'compositions?' is the definition.
('piece' can be a synonym of 'composition')
I don't understand how the rest of the clue works.
Can you help me to learn more?
(Other definitions for pieces that I've seen before include "barrels of wine" , "Fragments" , "Chessmen" , "Bits, portions" , "Portions, parts" .)