Pedant (6)
'pedant' is the definition.
(a pedant is a stickler for detail)
This is the entire clue.
(Other definitions for stickler that I've seen before include "Trickles for someone who insists" , "Purist" , "Punctilious, insistent person" , "Perfectionist" , "One's less than flexible" .)
'pedant' is the definition.
(I know that purist is a type of pedant)
This is all the clue.
(Other definitions for purist that I've seen before include "Pedantic type" , "Over-fastidious person" , "scrupulous" , "One who insists on precision and correctness" , "Fastidious person" .)