Bloated and drunk, need grog (8)

I believe the answer is:

engorged

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

'drunk need grog' is the wordplay.
'drunk' indicates anagramming the letters.
'need'+'grog'='needgrog'
'needgrog' anagrammed gives 'ENGORGED'.

'and' is the link.

Can you help me to learn more?

(Other definitions for engorged that I've seen before include "Filled to excess" , "Crammed full (of food)" , "Swollen with fluid" .)

I've seen this clue in The Independent.

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