Nothing in the existing circumstances resembles refuge in the midst of trouble (5)

I believe the answer is:

oasis

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'resembles refuge in the midst of trouble' is the definition.
I can't judge whether this defines the answer.

'nothing in the existing circumstances' is the wordplay.
'nothing' becomes 'O' (O resembles 0).
'in the existing circumstances' becomes 'as is' (I've seen this before).
'o'+'asis'='OASIS'

Can you help me to learn more?

(Other definitions for oasis that I've seen before include "A place of safety or sanctuary" , "Desert sanctuary" , "Area of calm amid hectic surroundings" , "quiet spot" , "retreat" .)

I've seen this clue in The Irish Times.

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