Offshore location one’s going to for broadcast (4)
I believe the answer is:
isle
'offshore location' is the definition.
'isle' can be an answer for 'location' (I have seen 'Geographic location' mean 'isle' so perhaps 'location' could also mean 'isle'). I am unsure of the 'offshore' bit.
'one's going to for broadcast' is the wordplay.
'one's' becomes 'i's' (Roman numeral).
'going to' becomes 'll' (as in he'll, we'll etc).
'for broadcast' indicates a 'sounds like' (homophone) clue.
'll' sounds like 'le'.
'is'+'le'='ISLE'
Can you help me to learn more?
(Other definitions for isle that I've seen before include "---- of Dogs, Thames peninsula" , "Could be Man" , "Atoll" , "Perspire" , "See 11 Across" .)