Two-wheeler parked in Clifton Gardens (5)
I believe the answer is:
tonga
'two-wheeler' is the definition.
(two-wheeled vehicle)
'parked in clifton gardens' is the wordplay.
'parked in' indicates a hidden word.
'TONGA' can be found hidden inside 'clifton gardens'.
(Other definitions for tonga that I've seen before include "SW Pacific monarchy" , "The Friendly Islands" , "Pacific Ocean kingdom" , "Relatively small" , "S.W Pacific Kingdom" .)