Crossword Genius

Know beforehand said number understand (7)

Ross

I believe the answer is:

foresee

'know beforehand' is the definition.
(I've seen this in another clue)

'said number understand' is the wordplay.
'said' indicates a 'sounds like' (homophone) clue.
'number' becomes 'four' (four is a kind of whole number).
'understand' becomes 'see' (synonyms).
'four' is a homophone of 'fore'.
'fore'+'see'='FORESEE'

(Other definitions for foresee that I've seen before include "Expect" , "Imagine" , "Prognosticate" , "To know beforehand" , "witness in advance?" .)

I've seen this clue in The Telegraph.
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