Device used in writing club successfully in the end (5)
I believe the answer is:
irony
'device used in writing' is the definition.
(irony is a literary technique or device)
'club successfully in the end' is the wordplay.
'club' becomes 'iron' (type of golf club).
'in the end' says to take the final letters.
The final letter of 'successfully' is 'y'.
'iron'+'y'='IRONY'
(Other definitions for irony that I've seen before include "Scornful wit" , "Paradoxical sarcasm" , "Figure of speech" , "Satire, sarcasm" , "sarcastic wit" .)