Motel amenity (4)
I believe the answer is:
pool
'motel amenity' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for pool that I've seen before include "Accumulate" , "In which to see water" , "Game; patch of liquid" , "Puddle - game with balls" , "Ball game - small body of water" .)