Kate perhaps writing about naked pose (4)
I believe the answer is:
moss
'kate' is the definition.
Both the answer and definition are singular nouns.
Perhaps there's a link between them I don't understand?
'writing about naked pose' is the wordplay.
'writing' becomes 'ms' (abbreviation for manuscript).
'about' is an insertion indicator.
'naked' says to take the centre (outside letters removed so centre is unclothed).
The middle of 'pose' is 'os'.
'ms' enclosing 'os' is 'MOSS'.
'perhaps' acts as a link.
Can you help me to learn more?
(Other definitions for moss that I've seen before include "Clear < tiny plants" , "that may hug trees?" , "A rolling stone gathers none" , "material not in Rolling Stones' collection?" , "Small plants growing as thick mat" .)