Type a letter (9)

I believe the answer is:

character

This clue is a double definition.

'type' is the first definition.
(I know that type can be written as character)

'a letter' is the second definition.
(written character)

(Other definitions for character that I've seen before include "Quality" , "strength of mind" , "Imaginary person in a work of fiction" , "Amusing individual" , "Part" .)

I've seen this clue in the Evening Standard and The Globe and Mail.

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