In acrimonious fashion Beryl shaken, taking it in with final movement (8)
I believe the answer is:
bitterly
'in acrimonious fashion beryl shaken taking it in with final movement' is the definition.
I can't tell whether this definition defines the answer.
'beryl shaken taking it in with final movement' is the wordplay.
'shaken' is an anagram indicator.
'taking' is an insertion indicator.
'in with final movement' becomes 't' (I am not sure about this - if you are sure you should believe this answer much more).
'beryl' is an anagram of 'berly'.
'it'+'t'='itt'
'berly' going around 'itt' is 'BITTERLY'.
Can you help me to learn more?
(Other definitions for bitterly that I've seen before include "Acrimoniously" , "Resentfully, rancorously" , "In a resentful manner" , "With resentment" , "Sharply, pungently" .)