### Clue: Poetical colour of beautiful boat in seascape, agree narrators (3-5)
### Answer: PEA-GREEN 
 ### Explanation: Definition: Poetical colour of beautiful boat
A hidden answer in 'seacsa**PE AGREE N**arrators'. The definition refers to Lear's *The Owl and the Pussycat*, with an extended definition. Lear's illustration for his poem.