Swimming pool in Bali dominated (4)
I believe the answer is:
lido
'swimming pool' is the definition.
(I've seen this before)
'in bali dominated' is the wordplay.
'in' says the answer is hidden in the clue.
'LIDO' is hidden in the letters of 'bali dominated'.
(Other definitions for lido that I've seen before include "---- di Jesolo, Italian Adriatic resort" , "Venetian resort" , "Public bathing beach" , "Swimming and leisure area" , "Aquatic leisure centre" .)