Fairly new ascetics commandeering a foreign hospital (8)
I believe the answer is:
youngish
'ascetics commandeering a foreign hospital' is the definition.
I can't judge whether this defines the answer.
'fairly new' is the wordplay.
I cannot really understand how this works, but
'new' could be 'young' (similar in meaning) and 'young' is found within the answer.
The remaining letters 'ish' is a valid word which might be clued in a way I don't see.
This may be the basis of the clue (or it may be nonsense).
Can you help me to learn more?
(Other definitions for youngish that I've seen before include "Fairly youthful" , "Rather immature" , "Not very old" .)