Colour Morecambe rock contains (5)
I believe the answer is:
amber
'colour' is the definition.
(amber is a kind of colour)
'morecambe rock contains' is the wordplay.
'contains' indicates the answer is hidden within the clue.
'AMBER' can be found hidden inside 'morecambe rock'.
(Other definitions for amber that I've seen before include "Light giving warning" , "Honey-yellow colour" , "forever written about" , "A yellowy resin" , "Yellow-orange" .)