Being greedy today, but totally stuck. 5a, 5 letters, type of internet message board **r*m. 5d, 7 letters, short lived style of highly colourful expressionistic painting that flourished in Paris around 1900-10 - **u*i*m, presume it is ism. 27a, 6,3 scarlet textile dye that was chiefly obtained from madder, but today is synthesised chemically T*r*e* r*d - presume it is red