Enticement that gets one into club (4)
I believe the answer is:
bait
'enticement' is the definition.
(bait is a kind of enticement)
'one into club' is the wordplay.
'one' becomes 'i' (Roman numeral).
'into' indicates putting letters inside.
'club' becomes 'bat' (I've seen this before).
'i' going into 'bat' is 'BAIT'.
'that gets' is the link.
(Other definitions for bait that I've seen before include "What lures" , "Boilie, for example" , "Enticement for fish" , "Food to entice fish; taunt" , "Angler's lure for fish" .)