It has tellies working when feed in back's plugged in (9,4)
I believe the answer is:
satellite dish
'in' is the definition.
Both the definition and answer are adjectives.
Perhaps they are linked in a way I don't understand?
'it has tellies working when feed in back's plugged' is the wordplay.
I cannot quite understand how this works, but
'it' could be 'sa' (SA can mean sex appeal, as in 'it') and 'sa' is present in the answer.
This may be the basis of the clue (or it may be nonsense).
Can you help me to learn more?
(Other definitions for satellite dish that I've seen before include "TV signal receiver" , "Bowl-shaped aerial" , "TV plate" , "TV?aerial" , "Type of TV receiver" .)