Fork out megabucks for warheads, perhaps (8)

I believe the answer is:

payloads

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'warheads perhaps' is the definition.
I can't tell whether this definition defines the answer.

'fork out megabucks' is the wordplay.
'fork out' becomes 'pay' (to fork out for something is to pay for it).
'megabucks' becomes 'loads' (loads of money).
'pay'+'loads'='PAYLOADS'

'for' is the link.

Can you help me to learn more?

(Another definition for payloads that I've seen is " warheads?".)

I've seen this clue in The Times.

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