A small amount of money or time, possibly (4)
I believe the answer is:
mite
'a small amount' is the definition.
(I've seen this in another clue)
'money or time possibly' is the wordplay.
'time' can be anagrammed to 'MITE'.
Though, I'm not sure how the anagram is indicated.
'of' acts as a link.
Can you help me to learn more?
(Other definitions for mite that I've seen before include "Child; a small amount" , "Minute creature" , "The widow's small donation" , "Tiny contribution, child" , "Microscopic animal" .)