Smooths (out) (5)
'smooths out' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for irons that I've seen before include "Golf-clubs with metal heads" , "Devices restricting personal freedom in prisons" , "One might have too many in the fire" , "Golf clubs with metal heads" , "Metal-headed golfclubs" .)
'smooths out' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for evens that I've seen before include "Makes equal" , "Odds on something very likely to win" , "These are odds, strangely" , "Smooths the odds" , "less likely than 27 [ODDS-ON]" .)