What may be trapped in coastal garbage? (4)
I believe the answer is:
alga
'what may' is the definition.
I can't judge whether this defines the answer.
'trapped in coastal garbage?' is the wordplay.
'trapped in' indicates the answer is hidden within the clue.
'ALGA' is hidden in the letters of 'coastal garbage'.
'be' is the link.
Can you help me to learn more?
(Other definitions for alga that I've seen before include "Simple, non-flowering, aquatic plant" , "Water plant with no stem or leaves" , "Autotrophic organism" , "Gala (anag.)" , "Seaweed family group" .)