Bagpipe pieces include works about Scotch pancakes (4,6)
I believe the answer is:
drop scones
'scotch pancakes' is the definition.
('drop scone' can be a synonym of 'scotch pancake')
'bagpipe pieces include works about' is the wordplay.
'bagpipe pieces' becomes 'drones' (pieces of music played on bagpipes).
'include' is an insertion indicator.
'works' becomes 'ops' (I've seen this in other clues).
'about' becomes 'c' (abbreviation for 'circa'**).
'ops'+'c'='opsc'
'drones' placed around 'opsc' is 'DROP SCONES'.
(Another definition for drop scones that I've seen is " We may gobble them up!".)