Plot involved danger (6)
I believe the answer is:
garden
'plot' is the definition.
(I know that garden is a type of plot)
'involved danger' is the wordplay.
'involved' indicates an anagram (involved can mean confusing or complex).
'danger' anagrammed gives 'GARDEN'.
(Other definitions for garden that I've seen before include "Danger (anag.)" , "Plant growing area" , "Land round house" , "Danger in Eden?" , "Ground adjoining house" .)