Times 815

[TheNovice]

Finding this one a tad tricky in parts.

5ac Held our tongue, having matured (7)

I have ??N?G?I

8dn Expert medical practitioner in retreat(5) I've got IAMBI but not sure of it's right

9dn Fluid and coal of course for the digestion (4,5).

??o? H?E??

[Claud.Butler]

5a Lingual?

[Lie-in King]

5a Engaged - Eng(lish) + aged
8d Demon - MO (in) den (retreat)
9d Food canal - anag 'and coal of'

[TheNovice]

Many thanks Lie In King - looks like yours truly has got a few errors to correct here - probably why I'm finding it so tough!!!!

I take it 6dn is Gnostic (Casting wildy around when answer is nothing to do with knowledge(7))