Crossword Genius

Parking where taxis do for a lark (5)

Ross

I believe the answer is:

prank

I'm a little stuck... Click here to teach me more about this clue!

'lark' is the definition.
(I've seen this before)

'parking where taxis do for a' is the wordplay.
I cannot quite understand how this works, but
'parking' could be 'p' (abbreviation on road signs) and 'p' is located in the answer.
'a' could be 'an' and 'an' is present in the answer.
This may be the basis of the clue (or it may be nonsense).

Can you help me to learn more?

(Other definitions for prank that I've seen before include "Mischievous act done for fun and amusement" , "April fool" , "Mischievous trick" , "(Amusing) trick" , "Escapade" .)

I've seen this clue in The Guardian.
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