23a an object that recalls a certain place, occasion or person (8) ??U?E?I? and
24a brittle savoury biscuits in the shape of knots or sticks (8) ?R?T?E??...
22a A common point or boundary between two things, subject etc (9) ?N?E?F?C? ... and 36d a warning or hint, especially given confidentially (3,3) T?? O?F
11d ?I?E?R algebra, branch of maths involving mapping between vector spaces
and 24d creature of the family LEPORIDAE bred in france since 1919 (3,6)
R?X RABBIT...