Oil patch spread around a sausage (9)
I believe the answer is:
chipolata
'sausage' is the definition.
(I know that chipolata is a type of sausage)
'oil patch spread around a' is the wordplay.
'spread around' is an anagram indicator.
'oil'+'patch'='oilpatch'
'oilpatch' is an anagram of 'chipolat'.
'chipolat'+'a'='CHIPOLATA'
(Other definitions for chipolata that I've seen before include "Small thin sausage" , "Type of sausage" , "banger" , "Party snack" .)