May (8)
(Other definitions for cape that I've seen before include "Wrath perhaps" , "Outer garment" , "Loose cloak or promontory" , "An old cloak or a headland" , "Short cloak" .)
'may' is the definition.
(may is another name for the hawthorn tree)
This is all the clue.
(Other definitions for hawthorn that I've seen before include "plant" , "Small spring-blooming tree" , "Spiky tree with small red berries" , "May tree" , "Prickly shrub" .)