Just 5 more to finish the crossword!!

[foxyfarmer]

There are plenty of letters to help though!!!
3 Certain to have plenty as expected (4,6) S_R_, E_O_G_ (looks like sure something but that O's thrown me!)
10 Be about to have the Spanish cooked meat included in white sauce (8) _E_H_M_L (I'm not one for foreign food! I'm a Yorkshire puddings lass!!!)
11 The first Christian perhaps (6) T_E_S_
20 Old call to stir up (6) E_C_ _ _
25 In the corner sat Zara the substitute (6) E_S_ _ _
I don't have a clue on any of these!!
Thanks for your help!
Foxy

[pandabear]

sure enough

[ST]

3 Sure Enough

10 Bechamel

11 Theist

20 Excite

25 Ersatz

[cheaton]

Sure enough

Bechamel

[pandabear]

10 bechamel

11 Theist

[dancecaller]

10. be c(circa=about) el(the Spanish?). Put ham (cooked meat) inside to give bechamel sauce, I think

[foxyfarmer]

Thanks for all your help! It's much appreciated. Foxy.