Charge one cent to get a black vehicle for hire (7)
I believe the answer is:
taxicab
'vehicle for hire' is the definition.
(I've seen this before)
'charge one cent to get a black' is the wordplay.
'charge' becomes 'tax' (tax is a kind of charge).
'one' becomes 'i' (Roman numeral).
'cent' becomes 'c'.
'to get' means one lot of letters go next to another.
'black' becomes 'b' (abbreviation as in pencil classifications).
'tax'+'i'+'c'+'a'+'b'='TAXICAB'
(Other definitions for taxicab that I've seen before include "transport" , "Vehicle for hire" , "Licensed passenger vehicle" , "Hire car" .)