Take the expression "ethiopian pandit", erase 4 letters and rearrange the rest to create an 11-letter adjective you surely know.
I hope (not absolutely sure) there is only one way to do it!
(In reply to
re(2): a tip LAST CHANCE by Ady TZIDON)
DIOPHANTINE.
A tip of the hat!
No errors in any of Ady's statements, and very very clever.