Letter from a Greek patriot, apparently (4)

I believe the answer is:

iota

'letter' is the definition.
(Greek letter)

'from a greek patriot apparently' is the wordplay.
'from' says the answer is hidden in the clue.
'IOTA' is hidden in the letters of 'greek patriot apparently'.

(Other definitions for iota that I've seen before include "Extremely small amount" , "Contrivance" , "'Very small amount, jot (4)'" , "Tiniest scrap" , "Smidgen" .)

I've seen this clue in the Evening Standard.

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