I’m the writer with a writer’s complaint, say, working in complete absorption (9)
I believe the answer is:
immersion
'complete absorption' is the definition.
(being completely immersed or absorbed in something)
'i'm the writer with a writer's complaint say working' is the wordplay.
'the writer' becomes 'I' (the person who is writing these clues).
'with' is a charade indicator (letters next to each other).
'a writer' becomes 'me' (the person who wrote the clues).
'complaint say' becomes 'rs' (I am not sure about this - if you are sure you should believe this answer much more).
'working' becomes 'on' (on can mean working or activated).
'me'+'rs'='mers'
'i' after 'mers' is 'mersi'.
'im'+'mersi'+'on'='IMMERSION'
'in' is the link.
Can you help me to learn more?
(Other definitions for immersion that I've seen before include "Deep absorption; baptism" , "Deep absorption (in a subject)" , "dip" , "Baptism; deep involvement" .)