Stuck on last few - any help appreciated, thanks. 5a Greek mathematician c.300 BC (6) ?U?L?D 37a Hindu ascetic (4) ?O?I - is this YOGI? 55a Skilful, adroit (6) L?E??? 2d Displacement of beats in music (11) S?N?O?A?I?N 42d Jamaica Pepper (8) ?L?S?I?? 46d Affectedly polite and refined (7) N?N?E?L