Only four more to do, would appreciate some help. My brain is tired of being racked.
27. For each goal twists support for plants. Think it might be trellis, but don't know why. (7)
54. Horse trial goes to north east junction for game divider (two words, 9 and 3)
84. Three directions get Mimi in a spin and pogo gets student to lido (8,4)
90. Soil field rations before good man meets Uriah (7, 4) think second word is probably Heap, as in Uriah Heap.
Thanks everyone, you are all so brilliant. (And yes, I am trying to curry favour.)
Good gracious, by the time I typed that message to D97 everyone else had answered. Thanks very much everyone. Sometimes I think I am among geniuses (and I mean this).