Kid a fellow a hundred per cent (5)
I believe the answer is:
total
'a hundred per cent' is the definition.
I can't judge whether this defines the answer.
'kid a fellow' is the wordplay.
'kid' becomes 'tot' (tot is a kind of kid).
'a fellow' becomes 'al' (man's name).
'tot'+'al'='TOTAL'
Can you help me to learn more?
(Other definitions for total that I've seen before include "Utter" , "Completely destroy" , "It might be grand" , "Final tally" , "Count" .)