Azed 1803

[pldcav]

1d Pancreatic enzyme requiring time in pricy nosh I'm breaking down (12)
Answer appears to be CHYMOTRYPSIN, but for the anagram to work one of the Ys should be an I

13a Acceleration in ringtone? It may figure in Ulan Bator exchange (5)
Answer appears to be MONGO, but why does MONO = ringtone?

Any comments welcome!

[Aquagility]

Google is giving me an enzyme for CHIMOTRYPSIN.

[gordonia]

Apparently there are 3 alternative spellings of this word.
CHIMOTRYPSIN,CHIMOTRIPSIN,and CHYMOTRIPSIN so you would appear to be correct.Hope this isn't too confusing lol!

[Quizmonster]

Neither Chambers - the recommended source - nor TOED offer the 'chimo...' version, so I was as confused as you, Pld. Nor did I get the 'ring-tone' idea.

[stephem]

Azed should have mentioned Chambers 2006 (as he did in a previous week) which has a meaning of mono as 'a monophonic ringtone'. But it doesn't have an alternative spelling of chymotrypsin.

[pldcav]

Thank you all