Times Jumbo 916 Cryptic

[woodyallan]

12d As ten is under twelve's close and fifty's over!(6) E?E?E?

I'm assuming ELEVEN but can't see why.Any explanation appreciated.

[bibblebub]

as ten is = EVEN
under = put ^ below...
twelvE's close = E
fifty = L

e l even

[Oldred]

e = twelve's close
l = 50
even - 10 is even

[bibblebub]

and 'over' indicates that the L goes above 'even'

also, 'eleven' fits the whole clue

[woodyallan]

Of course, many thanks.