I spent an age looking through Chambers and on-line crossword solver sites ... all to no avail. As a last resort I looked in Bradford's Crossword Solvers Dictionary, and listed under the heading "Identical" found the solution!!
Your letters are correct Minoru and the answer is MENECHMIANS.
Slaney then kindly supplied me with details concerning the derivation of the word as follows ....
The Oxford Companion to English Literature :-
The Roman writer Plautus wrote a play Men(a)echmi on which Shakespeare's Comedy of Errors is based.
http://www.theatrehistory.com/ancient/plautus0 03.html