Mephisto 2721

[foxspur]

Can't find a word like this anywhere in the dictionary!
19ac Mac's most keen to create deception with numbers about to be done over (8) I have SN?L?EST
Please put me out of my misery! All help appreciated

[mazie]

I think it's a scottish word. Snellest

[dannyk13]

Scottish dictionary gives keen as snell so I think Mazie is right(she usually is)

[foxspur]

Thanks, mazie and dannyk. I will revisit Collins and see how I missed it. (No surprise there to my wife, who thinks I could miss an elephant in an empty room!)