Amateur only has money (4)
I believe the answer is:
euro
'money' is the definition.
(currency of the Eurozone)
'amateur only has' is the wordplay.
'has' says the answer is hidden in the clue.
'EURO' is hidden in the letters of 'amateur only'.
(Other definitions for euro that I've seen before include "Currency of Germany" , "Currency of Greece" , "Finnish currency" , "Major currency" , "The "single currency"" .)