Enter text, particular category (4)
I believe the answer is:
type
This clue could be a double definition.
'enter text' is the first definition.
(I've seen this in another clue)
'particular category' is the second definition.
'type' can be an answer for 'category' (type is a kind of category). I am not certain of the 'particular' bit.
Can you help me to learn more?
(Other definitions for type that I've seen before include "Use a keyboard; sort" , "get words on to paper?" , "Kind or class as of people" , "The face" , "Courier for example" .)