With which crabs bite kids (7)
I believe the answer is:
nippers
'kids' is the definition.
(I know this)
'with which crabs bite' is the wordplay.
I cannot quite understand how this works, but
'bite' could be 'nip' (nip is a kind of bite) and 'nip' is located in the answer.
The remaining letters 'pers' is a valid word which might be clued in a way I don't understand.
This may be the basis of the clue (or it may be nonsense).
Can you help me to learn more?
(Other definitions for nippers that I've seen before include "pickpockets" , "Claws; children" , "kids?" , "They put the squeeze on" , "Youngsters" .)