9 across (7) R_T_E_N Rough, loosely-woven dress fabric.
15 across (8) _O_I_I_T Person who gives plain explanatory sermons.
13 down (10) _R_C_O_A_E Management by an official in some English universities. Proctorate?
Many thanks, JimJools and dannyk13. Now for something completely different - I`m off to do some snow clearing - using a garden leaf vac set to blow -works very well unless you get blow-back.