Annual review of pay forgetting the old man Elgar? No! (8)
I believe the answer is:
yearlong
'annual' is the definition.
'review of pay forgetting the old man elgar? no' is the wordplay.
'review of' indicates anagramming the letters.
'forgetting' is a deletion indicator.
'the old man' becomes 'pa' (both can mean father).
'pay' with 'pa' taken out is 'y'.
'y'+'elgar'+'no'='yelgarno'
'yelgarno' with letters rearranged gives 'YEARLONG'.
(Other definitions for yearlong that I've seen before include "Over whole 12 months" , "throughout a period of revolution" , "all through 1984, for example" , "Lasting 365 (or 366) days" , "Lasting twelve months" .)