Wat a rebel! (5)
I believe the answer is:
tyler
This clue might be a double definition.
'wat' is the first definition.
Both the definition and answer are singular nouns.
Perhaps you can see a link between them that I don't see?
'a rebel' is the second definition.
Can you help me to learn more?
(Other definitions for tyler that I've seen before include "Revolting man" , "Revolutionary" , "Wat, leader of the Peasants' Revolt" , "He had responsibility for rising" .)