Strand, maroon (6)
I believe the answer is:
desert
This clue is a double definition.
'strand' is the first definition.
(I know that strand is a more specific form of desert)
'maroon' is the second definition.
(as in to maroon or desert someone on an island)
(Other definitions for desert that I've seen before include "Sahara, Gobi, etc" , "Run away (from army)" , "See 23" , "Abandon, desolate area" , "Arid region with little or no vegetation" .)