Abandon cat (5,2)
I believe the answer is:
throw up
This clue is a double definition.
'abandon' is the first definition.
(I've seen this before)
'cat' is the second definition.
('throw up' can be a synonym of 'cat')
(Other definitions for throw up that I've seen before include "Abandon (something)" , "Be sick" , "Produce - vomit" , "find" , "Reveal" .)