Have come to a standstill. Please help.
57a Keep company (with) (6) ?o?n??
58a Not proven (7) ?n?r???
66a Raise to the highest degree (8) ?a?i?i?e
51d Shade of brown (5) u???r
54d Learn parrot-fashion (8) ???o?i?e
Sorry folks my brain has gone to sleep