Some pretty pessimistic characters (5)

I believe the answer is:

types

'characters' is the definition.
(I know this)

'some pretty pessimistic' is the wordplay.
'some' indicates a hidden word (some parts of the word are used).
'TYPES' is hidden in the letters of 'pretty pessimistic'.

(Other definitions for types that I've seen before include "Sorts - varieties" , "Writes using a keyboard" , "Sorts; kinds" , "Categories having common characteristics" , "Characters" .)

I've seen this clue in The Telegraph.

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