Crossword Genius

It turned brown for a giant (5)

Ross

I believe the answer is:

titan

'giant' is the definition.
(titans are giant mythological creatures)

'it turned brown' is the wordplay.
'turned' says the letters should be written backwards.
'brown' becomes 'tan' (tan is a kind of brown).
'it' written backwards gives 'ti'.
'ti'+'tan'='TITAN'

'for a' acts as a link.

(Other definitions for titan that I've seen before include "An old Greek god - Atlas was one" , "A giant; Saturn moon" , "colossal one" , "Saturn's moon" , "Taint in old Greek god" .)

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