They stay abroad, parking in Texas, possibly (6)
I believe the answer is:
expats
'they stay abroad' is the definition.
I don't know anything about this answer so I can't tell whether it can be defined by this definition.
'parking in texas possibly' is the wordplay.
'parking' becomes 'p' (abbreviation on road signs).
'in' means one lot of letters goes inside another.
'possibly' indicates anagramming the letters.
'texas' with letters rearranged gives 'exats'.
'p' placed within 'exats' is 'EXPATS'.
Can you help me to learn more?
(Other definitions for expats that I've seen before include "Britons living abroad (abbrev.)" , "People living outside their native country" , "They moved abroad" , "Exiles, in short" .)