Irish working for club (4)
I believe the answer is:
iron
'club' is the definition.
(iron is a kind of club)
'irish working' is the wordplay.
'irish' becomes 'ir' (abbreviation).
'working' becomes 'on'.
'ir'+'on'='IRON'
'for' acts as a link.
(Other definitions for iron that I've seen before include "Metal obtained from haematite" , "The metallic element plays a role in the transport of oxygen by the blood" , "What's used to make pitch" , "Very robust" , "Main element in steel" .)