Fixed broken TV (4,3)
I believe the answer is:
dead set
'fixed' is the definition.
Both the answer and definition are adjectives. Maybe they are linked in a way I don't understand?
'broken tv' is the wordplay.
'broken' becomes 'dead' (I am not sure about this - if you are sure you should believe this answer much more).
'tv' becomes 'set' (I've seen this in other clues).
'dead'+'set'='DEAD-SET'
Can you help me to learn more?
(Other definitions for dead set that I've seen before include "Absolutely determined, bent on" , "Bent on - sedated (anag)" , "Fixed in one's purpose" , "Determined (upon)" , "A determined attack - from moribund group?" .)