Critic of sheep invading house? Go away! (8)
I believe the answer is:
reviewer
'critic' is the definition.
(I know that reviewer is a type of critic)
'sheep invading house? go away' is the wordplay.
I cannot really see how this works, but
'sheep' could be 'ewe' (a ewe is a female sheep) and 'ewe' is located in the answer.
This may be the basis of the clue (or it may be nonsense).
'of' is the link.
Can you help me to learn more?
(Other definitions for reviewer that I've seen before include "Writer of criticism" , "One should be critical" , "Writer who reports and analyses" , "Writer who assesses the merits of a book, play etc." , "critical sort" .)