Many schemes must ignore parking (4)
I believe the answer is:
lots
'many' is the definition.
(I've seen this before)
'schemes must ignore parking' is the wordplay.
'schemes' becomes 'plots' (plot is a kind of scheme).
'must ignore' indicates named letters should be taken away.
'parking' becomes 'p'.
'plots' with 'p' removed is 'LOTS'.
(Other definitions for lots that I've seen before include "Tons" , "Oodles" , "Great quantities" , "Loads" , "Many - items in a sale" .)