Little striker in mad derby (5)
I believe the answer is:
adder
'little striker' is the definition.
Although both the answer and definition are singular nouns, I don't understand how they can define each other.
'in mad derby' is the wordplay.
'in' indicates the answer is hidden within the clue.
'ADDER' can be found hidden inside 'mad derby'.
Can you help me to learn more?
(Other definitions for adder that I've seen before include "Sliding" , "a poisonous type" , "Something you have to reckon with" , "venomous creature" , "Totter" .)