Irish county tightens up bottle openers (10)

I believe the answer is:

corkscrews

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'bottle openers' is the definition.
(corkscrew is a kind of bottle opener)

'irish county tightens up' is the wordplay.
'irish county' becomes 'cork' (county of Ireland).
'tightens up' becomes 'screws' (screwing is a kind of tightening. I am not sure about the 'up' bit.).
'cork'+'screws'='CORKSCREWS'

Can you help me to learn more?

(Another definition for corkscrews that I've seen is " these'll help those who've got in the drink".)

I've seen this clue in the Sydney Morning Herald.

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