Giver of opinions, one no good interrupting trustworthy bosses? (8,5)
I believe the answer is:
sounding board
'giver of opinions' is the definition.
(you go to a sounding board for opinions)
'one no good interrupting trustworthy bosses?' is the wordplay.
'one' becomes 'i' (Roman numeral).
'no good' becomes 'ng' (abbreviation).
'interrupting' is an insertion indicator.
'trustworthy' becomes 'sound' (sound can mean reliable or trustworthy).
'bosses?' becomes 'board' (board of directors).
'i'+'ng'='ing'
'sound'+'board'='soundboard'
'ing' put into 'soundboard' is 'SOUNDING-BOARD'.
(Other definitions for sounding board that I've seen before include "means of testing idea" , "Means of testing opinion" , "One whose opinion is sought" , "Recipient of experimental ideas perhaps" .)