Five cents (6)
I believe the answer is:
nickel
'five cents' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for nickel that I've seen before include "A 5-cent coin in USA" , "very little money" , "US five cent piece" , "5 cent piece - element" , "One twentieth of a US dollar" .)