Figure: appreciate it! (5)
I believe the answer is:
digit
'figure' is the definition.
(I've seen this before)
'appreciate it' is the wordplay.
'appreciate' becomes 'dig' (to dig can mean to appreciate or 'get').
'dig'+'it'='DIGIT'
(Other definitions for digit that I've seen before include "E.g. toe" , "One in ten, say" , "one's given?" , "Single number" , "A character" .)