18 down More to write about Roman law practice producing elaborate arrangements (8) -L-X---S
I am guessing FLEXISMS?? ( LEX is in there)
27 ac Runner Ray (5) --A-E I am thinking SKATE?
19 ac Abruptly leave Japan with lieutenant one captivated (4) --L-
19 down They provide milk tops (7) --R-E-S
many many thanks in anticipation