collection of opinions (4)
I believe the answer is:
poll
'collection of opinions' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for poll that I've seen before include "Survey - remove horns" , "Canvass (for opinion); lop (tree)" , "A vote; a head" , "head-count" , "coverage of vote for 9d > [WHISTLE BLOWER]" .)