Mean Streets' lead in close-fitting garment (6)
I believe the answer is:
tights
'close-fitting garment' is the definition.
(I've seen this before)
'mean streets' lead' is the wordplay.
'mean' becomes 'tight' (both can mean miserly).
'lead' indicates taking the first letters.
The initial letter of 'streets' is 's'.
'tight'+'s'='TIGHTS'
'in' acts as a link.
(Other definitions for tights that I've seen before include "Nether garments for women or acrobats (6)" , "Film '25: Men in --'" , "Leg-wear for women" , "Ladies or theatrical hose" , "Leg garment" .)