All questions and answers relate to the body in some way
90,Can be seen, but not heard (9)
93,Join two pieces of wood together by driving nails obliquely (7)
99,Woollen yarn of two or more threads,used in hand knitting esp. for stockings (9)
Don't think Children can be seen but not heard! Im stumped with that one too. Completely baffled and doesn't make sense on No.61 My bones denouse. No number of letters either.