Escapist (7)
I believe the answer is:
dreamer
'escapist' is the definition.
(synonyms)
This is all the clue.
(Other definitions for dreamer that I've seen before include "One who tends to live in an unreal world" , "such an unpractical person!" , "Martin Luther King" , "stargazer" , ""You may say I'm a __" (John Lennon)" .)