Custom of south-west India beat it! (2,4)
I believe the answer is:
go away
'south-west india beat it' is the definition.
I can't judge whether this defines the answer.
'custom' is the wordplay.
I cannot really see how this works, but
'custom' could be 'way' (I've seen this in another clue) and 'way' is found within the answer.
The remaining letters 'goa' is a valid word which might be clued in a way I don't understand.
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 go away that I've seen before include "Leave" , "Push off" , "Depart" , "Disappear" , "Scram" .)