Parking area for taxis, possibly, is a joke (5)
I believe the answer is:
prank
'a joke' is the definition.
(synonyms)
I can't explain the rest of the clue.
Can you help me to learn more?
(Other definitions for prank that I've seen before include "Escapade" , "Lark" , "High-spirited mischief" , "April fool" , "Mischievous trick" .)