Refined chap set up shelter (7)
I believe the answer is:
genteel
'refined' is the definition.
(I've seen this before)
'chap set up shelter' is the wordplay.
'chap' becomes 'gent' (I've seen this in other clues**).
'set up' says the letters should be written backwards.
'shelter' becomes 'lee' (I've seen this before).
'lee' reversed gives 'eel'.
'gent'+'eel'='GENTEEL'
(Other definitions for genteel that I've seen before include "Affectedly polite and refined" , "Overly polite or refined" , "Politely refined" , "Marked by refinement in taste and manners" , "Fashionable" .)