“Not Much Left”: a strange title (6)
I believe the answer is:
little
'not much' is the definition.
(a small amount)
'left a strange title' is the wordplay.
'left' becomes 'l' (common abbreviation).
'a strange' is an anagram indicator.
'title' is an anagram of 'ittle'.
'l'+'ittle'='LITTLE'
(Other definitions for little that I've seen before include "Of no great size" , "Peanuts" , "part of Stuart in film?" , "Small in size or amount" , "Jobsworth?" .)