We are advised not to have too many of these in the fire (5)

I believe the answer is:

irons

(Other definitions for irons that I've seen before include "Golfclubs with metal hands" , "Imposers of restrictions" , "Smooths, presses" , "Presses clothes" , "Metal-headed golfclubs" .)

I've seen this clue in The Irish Times.

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