Plutonium included in revised plan too? Extra funding required (3-2,4)
I believe the answer is:
top-up loan
'extra funding required' is the definition.
I don't know anything about this answer so I cannot judge whether this works.
'plutonium included in revised plan too?' is the wordplay.
'plutonium' becomes 'Pu' (Pu is the chemical symbol for plutonium).
'included in' indicates putting letters inside.
'revised' is an anagram indicator.
'plan'+'too'='plantoo'
'plantoo' is an anagram of 'toploan'.
'pu' put within 'toploan' is 'TOP-UP LOAN'.
Can you help me to learn more?
(Another definition for top-up loan that I've seen is " further advance".)