Maybe brief jibe spin doctor spun (3,11)
I believe the answer is:
job description
'maybe brief' is the definition.
The definition suggests a singular noun which matches the answer.
'jibe spin doctor spun' is the wordplay.
'spun' is an anagram indicator.
'jibe'+'spin'+'doctor'='jibespindoctor'
'jibespindoctor' anagrammed gives 'JOB DESCRIPTION'.
Can you help me to learn more?
(Other definitions for job description that I've seen before include "duties assigned" , "18 [PATIENT]" , "Outline of tasks" , "Details of position" .)