Prepare to try gas (not oxygen) when containing bad air (7)
Guardian
Cryptic
#29012
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25 Across
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2023-03-08
Generating...
I haven't cracked this one yet — but the brilliant team at Fifteensquared have:
An envelope (‘when containing’) of RAI, an anagram (‘bad’) of ‘air’ in ARG[o]N (‘gas’) minus the O (‘not oxygen’).