Singular garden footwear (4)
I believe the answer is:
shoe
'footwear' is the definition.
(shoe is a kind of footwear)
'singular garden' is the wordplay.
'singular' becomes 's' (abbreviation sometimes used in dictionaries).
'garden' becomes 'hoe' (I've seen this in other clues**).
's'+'hoe'='SHOE'
(Other definitions for shoe that I've seen before include "Pump, for example" , "One of a pair to wear" , "Slip-on or lace-up?" , "Trainer maybe" , "Item of footwear" .)