Possible Clues:

• Spice is something extracted for an Indian
• Spice plant
• Plant with seeds used for flavouring
• Plant posh European's put under marshy land
• Plant cultivated for forage and for its medicinal seeds
• An aromatic part of East Anglia University finally producing offensive smell
• Flooded area adjoining high-class European plant
• Chinese money accepted by European for spice-producing plant
• Stylish European goes to marsh for its seeds
• Plant seen in marsh in our country not quite the usual colour