Crops scattered alongside one old house (7)
I believe the answer is:
scorpio
'house' is the definition.
(Scorpio is an example)
'crops scattered alongside one old' is the wordplay.
'scattered alongside' indicates an anagram.
'one' becomes 'i' (Roman numeral).
'old' becomes 'o' (abbreviation).
'crops' with its letters mixed up with 'i' can make 'scorpi'.
'scorpi'+'o'='SCORPIO'
(Other definitions for scorpio that I've seen before include "Stinger" , "star group" , "Person born between 23 October and 22 November?" , "A heavenly body" , "Sign of stinging arachnid" .)