Sloe gin, a strange motor fuel! (8)
I believe the answer is:
gasoline
'motor fuel' is the definition.
(I know that motor fuel can be written as gasoline)
'sloe gin a strange' is the wordplay.
'strange' is an anagram indicator.
'sloe'+'gin'+'a'='sloegina'
'sloegina' is an anagram of 'GASOLINE'.
(Other definitions for gasoline that I've seen before include "Sole gain (anag.); petrol" , "US petrol" , "American petrol in full" , "Fossil fuel" , "US fuel" .)