Fieldfare

2186: From the off

Unclued lights (two of two words and one doing double duty), singly or paired, reveal some that are to be gone over, and two that famously did so. Ignore one accent and two apostrophes.   Across   1    Paradoxical suit, a product of mine (13, two words) 9    Police once crashed into rumpus (7) 14   

To 2183: Group theory

Extra letters in clues plus 1A give ‘the separation of philosophers into sages and cranks’, an extract from a quotation by QUINE (35). 24, 25, 29 are sages; 17, 39, 42 are cranks. First prize Storm Hutchinson, Dulas, Anglesey Runners-up William Spont, Bellingham, Massachusetts; Nick Hussey, Overton, Hampshire