Parking place for taxis to wait is a joke (5)
I believe the answer is:
prank
'a joke' is the definition.
(synonyms)
'parking place' is the wordplay.
'parking' becomes 'p' (abbreviation on road signs).
'place' becomes 'rank' (synonyms).
'p'+'rank'='PRANK'
'for taxis to wait is' is the link.
This may not be right. Some or all of it may be part of another bit of the clue.
Can you help me to learn more?
(Other definitions for prank that I've seen before include "April fool" , "High-spirited mischief" , "Mischievous trick" , "Mischievous act done for fun and amusement" , "Lark" .)