Sunday mail

[annie49]

Stuck on my last few clues --- can anyone help please

11d bulk of the population,who rarely express their opinions (6 8)
?i?e?t ?a?u?i??
41a insincere (9) ?y?t?e?i?
20d What's in this Lanarkshire diet (5) e?d?r

Tnx again to anyone who can help

[baitress]

11d - silent majority.

[shooty]

20 eider ? (reversed inside)

[baitress]

20d - looks like eider. in the clue backwards.

[Calibax]

41 Synthetic?

[baitress]

41a - synthetic

[annie49]

Thanks folks that it sorted now Thnx again