Crossword Genius

Prognosticated after drink's finished (9)

Ross

I believe the answer is:

portended

'prognosticated' is the definition.
('portend' can be a synonym of 'prognosticate')

'after drink's finished' is the wordplay.
'after' means one lot of letters go next to another.
'drink' becomes 'port' (port is a kind of drink).
'finished' becomes 'ended' ('end' can be a synonym of 'finish').
'port' next to 'ended' is 'PORTENDED'.

(Another definition for portended that I've seen is " forecast".)

I've seen this clue in The Telegraph.
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