Perhaps Indian flying ace breaking leg (5)
I believe the answer is:
ocean
'perhaps indian' is the definition.
(Indian Ocean is an example)
'flying ace breaking leg' is the wordplay.
'flying' is an anagram indicator (letters fly around into new positions).
'breaking' indicates putting letters inside.
'leg' becomes 'on' (cricket term, fielding positions).
'ace' anagrammed gives 'cea'.
'cea' placed into 'on' is 'OCEAN'.
(Other definitions for ocean that I've seen before include "Vast quantity of liquid" , "eg Indian, Atlantic" , "Large expanse of water" , "Large amount of water and" , "tons of water" .)