Such objects as fine dogs' tails (6)
I believe the answer is:
things
'such objects' is the definition.
'things' can be an answer for 'objects' (I've seen this before). I'm unsure of the 'such' bit.
'fine dogs' tails' is the wordplay.
'fine' becomes 'thin' (similar in meaning).
'dogs' tails' becomes 'gs' (I can't explain this - if you can you should give a lot more credence to this answer).
'thin'+'gs'='THINGS'
'as' is the link.
Can you help me to learn more?
(Other definitions for things that I've seen before include "Objects" , "Stuff" , "Items" .)