Extremely thrifty, penny-wise sort (4)

I believe the answer is:

type

I'm a little stuck... Click here to teach me more about this clue!

'sort' is the definition.
(I know that type is a type of sort)

'extremely thrifty penny-wise' is the wordplay.
'TYPE' is hidden within the letters.
But, I am uncertain how the hidden word is indicated.

Can you help me to learn more?

(Other definitions for type that I've seen before include "output, printed" , "of a certain kind" , "Write letters" , "Write using a keyboard" , "Class, kind or printed characters" .)

I've seen this clue in The Guardian.

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