Hurry and appeal, after policy unwelcoming to animals is reversed (4,2,2)
I believe the answer is:
step on it
'hurry' is the definition.
(I've seen this before)
'appeal after policy unwelcoming to animals is reversed' is the wordplay.
I cannot really understand how this works, but
'appeal' could be 'it' ('it' can mean something attractive or appealing) and 'it' is found within the answer.
The remaining letters 'stepon' is a valid word which might be clued in a way I don't understand.
This explanation may well be incorrect...
'and' acts as a link.
Can you help me to learn more?
(Other definitions for step on it that I've seen before include "to take advantage of escalating opportunity" , "Go for speed" , "Move quickly" , "Be quick" , "Get a move on!" .)