Crossword Genius

Fathead accustomed to being overloaded! (5)

Ross

I believe the answer is:

fused

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'being overloaded' is the definition.
Both the definition and answer are adjectives. Maybe there's an association between them I don't understand?

'fathead accustomed' is the wordplay.
'fathead' becomes 'f' (head letter of 'fat').
'accustomed' becomes 'used' (I've seen this before).
'f'+'used'='FUSED'

'to' acts as a link.

Can you help me to learn more?

(Other definitions for fused that I've seen before include "Melted together" , "Joined by melting" , "Combined" , "Welded together by heat" , "Stuck together" .)

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