No one requiring doctor's appointment? OK with some reservations (3,4,4)
I believe the answer is:
all very well
'ok with some reservations' is the definition.
('it's all very well, but...')
I cannot understand how the rest of the clue works.
(Other definitions for all very well that I've seen before include "Everyone's fit" , "make an ironic objection" , "no one ill?" , "Phrase often introducing an objection" , "that's fine as far as it goes" .)