2768: Overheads

The nine unclued lights are all of a kind. Three are of two words. Ignore one apostrophe. Across 11    Contrary French articles entertain leaderless tranche of voters (9) 12    Piece of propaganda follows age-old beliefs (5)  13   GP boss and rep to supply sweets (11) 14    Parroted piece? (4)  18   Fight starts to intensify about

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