Focus outside broadcast on hearing (9)
I believe the answer is:
obsession
'focus outside' is the definition.
The answer and definition can be both related to thinking as well as being singular nouns.
Perhaps they are linked in a way I don't understand?
'broadcast on hearing' is the wordplay.
'broadcast' becomes 'ob' (I've seen this in other clues).
'on' means one lot of letters go next to another (in a down clue, letters appear on others).
'hearing' becomes 'session' (I've seen this before).
'ob'+'session'='OBSESSION'
Can you help me to learn more?
(Other definitions for obsession that I've seen before include "Unhealthy compulsion" , "Ruling passion" , "Compulsion, fixation" , "Persistent preoccupation" , "Complex" .)