### Clue: Reddy-brown deer reported in oily sea foam (9,6)
### Answer: CHOCOLATE MOUSSE 
 ### Explanation: Definition: oily sea foam
  CHOCOLATE(the colour,reddish brown) MOUSSE{**homophone of**(reported) "moose", North American mammal of the deer family, occuring in north Europe and Asia as the "elk"}
Defn:  Having worked in the oil industry, this jargon was familiar to me, having touched, smelled, but definitely not tasted, it.  An apt description otherwise for an emulsion,foam that is formed when crude or fuel oil mixes with water and air especially after an oil spill at sea, and then gets washed ashore.  Nasty stuff.  The meaning doesn't appear to have entered the traditional references?