Turner, Irish guard? (9)

I believe the answer is:

corkscrew

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'turner' is the definition.
(something which turns)

'irish guard?' is the wordplay.
'irish' becomes 'cork' (I can't explain this - if you can you should believe this answer much more).
'guard?' becomes 'screw' (I've seen this before).
'cork'+'screw'='CORKSCREW'

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(Other definitions for corkscrew that I've seen before include "convoluted course" , "Wine bottle opener" , "Twist" , "This might help one who gets in the drink" , "Move in a spiral manner" .)

I've seen this clue in The Times.

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