State of silent exasperation (5)

I believe the answer is:

texas

'state' is the definition.
(Texas is an example)

'of silent exasperation' is the wordplay.
'of' indicates a hidden word.
'TEXAS' can be found hidden inside 'silent exasperation'.

(Other definitions for texas that I've seen before include "Austin's state" , "Second-largest US state by area" , "Breed of cattle -- non-Goths relax (anag)" , "America's Lone Star State" , "State on the Gulf of Mexico" .)

I've seen this clue in The Telegraph.

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