Girondists' club? (4)

I believe the answer is:

iron

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

'club?' is the definition.
(type of golf club)

'girondists'' is the wordplay.
'IRON' is hidden within the letters.
However, I'm unsure how this is indicated.

Can you help me to learn more?

(Other definitions for iron that I've seen before include "Remove creases from" , "Club to smooth the cloth" , "Implacable - golf club" , "Press - element" , "Very robust" .)

I've seen this clue in the Evening Standard.

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