"conservative opinion" is correct and usable in written English.
For example, "Many people hold a conservative opinion on taxation policy."
He courted and wooed Republicans and conservative opinion makers.
Mainstream conservative opinion in Colombia has reacted positively to the news.
They tend to reflect a narrow range of predominantly conservative opinion.
His Katrina coverage seemed to be a turning point in some conservative opinion about him.
But the thin blue line of Scottish Conservative opinion is being tested.
In its inaugural issue in November 1955, National Review had declared itself a "vigorous and incorruptible journal of conservative opinion".
Conservative opinion-makers seem worried.
Conservative opinion-writers again celebrated his bravery.
Not yet.The elder statesmen of conservative opinion-making are not displeased with Mr Roberts's compromise.
Nearly every important conservative opinion-maker and think tank has rallied around his policies.
He mentored several future stars of conservative opinion-mongering, including Dinesh D'Souza, Gregory Fossedal, and Laura Ingraham.
