Pieces from Beryl Bainbridge held up well (4)
I believe the answer is:
ably
'well' is the definition.
(I've seen this before)
'pieces from beryl bainbridge held up' is the wordplay.
'pieces' says the answer is hidden in the clue (I've seen 'piece' mean this).
'held up' says the letters should be written backwards.
'ylba' is hidden in the letters of 'from beryl bainbridge'.
'ylba' reversed gives 'ABLY'.
(Other definitions for ably that I've seen before include "With great skill" , "With competence" , "In a competent fashion" , "In proficient manner" , "well" .)