Stuck in bottom right corner!
18a Of water, cause to be motionless, having no current (8) ???G???E
22a A knob at the base of a deer's horn (4) ???R
26a Cotton or linen fabrics with a glossy finish (7) ??T???S
15d Those who believe in central government control of economic and social affairs (7) ???T?S?? - PLEASE NOTE IT IS 7 LETTERS INDICATED IN THE CLUE BUT I HAVE 8 SQUARES ON THE ACTUAL XWORD!
19d Of a delicate blue colour (7) ????I??