Hi
I'm stuck on three, but think I know one answer, but don't 'get' the wordplay:
18 across: Have some reason not to do something? (3) C _ N I feel this should be 'can', but don't know why!
9 across: Girl's turned high maintenance, discarding much clothing (5) N _ A _ H
26 across: One problem for dentist briefly in GP's practice (5) I _ O _ A
Any help appreciated
Thanks in advance