Litter on crossing in town (7)
I believe the answer is:
bedford
'town' is the definition.
(I've seen this before)
'litter on crossing' is the wordplay.
'litter on' becomes 'bed' (I am not sure about this - if you are sure you should believe this answer much more).
'crossing' becomes 'ford' (synonyms).
'bed'+'ford'='BEDFORD'
'in' is the link.
Can you help me to learn more?
(Other definitions for bedford that I've seen before include "County town to north of London" , "English county town" .)