Stare at fight that's set (9)
I believe the answer is:
gogglebox
'set' is the definition.
Both the definition and answer are singular nouns.
Maybe they are linked in a way I don't understand?
'stare at fight' is the wordplay.
'stare' becomes 'goggle' (I've seen this in another clue).
'at' means one lot of letters go next to another.
'fight' becomes 'box' (boxing is a kind of fighting).
'goggle'+'box'='GOGGLEBOX'
'that's' is the link.
Can you help me to learn more?
(Other definitions for gogglebox that I've seen before include "Television set" , "TV" .)