The rearmost in resort, one's first property? (7,4)
I believe the answer is:
starter home
'one's first property?' is the definition.
(the first home bought by a person)
'the rearmost in resort' is the wordplay.
'in resort' indicates an anagram.
'the'+'rearmost'='therearmost'
'therearmost' with letters rearranged gives 'STARTER HOME'.
(Other definitions for starter home that I've seen before include "First property" , "First-time property" , "small flat perhaps" .)