Finally, a left-leaning Yank (3,2)
I believe the answer is:
all up
'finally' is the definition.
I don't know anything about this answer so I cannot judge whether this works.
'a left-leaning yank' is the wordplay.
'left-leaning' shows that the letters should be reversed in order (letters written right to left).
'yank' becomes 'pull' (I've seen this in another clue).
'pull' reversed gives 'llup'.
'a'+'llup'='ALL-UP'
Can you help me to learn more?
(Other definitions for all up that I've seen before include "carrying some weight" , "total" .)