Jumper carried by bloke in desert (6)
I believe the answer is:
maroon
'desert' is the definition.
(to maroon someone is to desert them somewhere)
'jumper carried by bloke' is the wordplay.
'jumper' becomes 'roo' (short for kangaroo, something which jumps).
'carried by' means one lot of letters goes inside another.
'bloke' becomes 'man' (informal term for a man).
'roo' going into 'man' is 'MAROON'.
'in' acts as a link.
(Other definitions for maroon that I've seen before include "Reddish-brown" , "Slaves' descendant" , "Abandon; firework" , "Brownish-crimson - abandon ashore" , "Isolate uncomfortably" .)