Dog excrement Democrat left on 3rd Avenue (6)
I believe the answer is:
poodle
'dog' is the definition.
(poodle is a kind of dog)
'excrement democrat left on 3rd avenue' is the wordplay.
'excrement democrat' becomes 'pood' (I can't justify this - if you can you should believe this answer much more).
'left' becomes 'l' (common abbreviation).
'on' is a charade indicator (letters next to each other).
'ord avenue' becomes 'e' (ord letter of 'avenue').
'pood'+'l'+'e'='POODLE'
Can you help me to learn more?
(Other definitions for poodle that I've seen before include "Dog (seen in a parlour?)" , "Small dog" , "toady?" , "Pet dog with clipped curly coat" , "5 [MANS BEST FRIEND]" .)