One on leave somewhere in India (3)
I believe the answer is:
goa
'in india' is the definition.
(I've seen this before)
'one on leave somewhere' is the wordplay.
'one' becomes 'a'.
'on' is a charade indicator (letters next to each other).
'leave somewhere' becomes 'go' (I am not sure about the 'somewhere' bit.).
'a' after 'go' is 'GOA'.
Can you help me to learn more?
(Other definitions for goa that I've seen before include "Part of West India" , "State of India, a former Portuguese colony" , "part of subcontinent" , "Indian island state" , "Former Portuguese territory in India" .)