Tape about small tailless dog (8)
I believe the answer is:
cassette
'tape' is the definition.
(cassette tape is a kind of tape)
'small tailless dog' is the wordplay.
'small' becomes 'cas' (I can't explain this - if you can you should give a lot more credence to this answer).
'tailless' means to remove the last letter (the tail of the word is removed).
'dog' becomes 'setter' (setter is a type of dog).
'setter' with its final letter taken off is 'sette'.
'cas'+'sette'='CASSETTE'
'about' is the link.
Can you help me to learn more?
(Other definitions for cassette that I've seen before include "It may contain film" , "Recording medium" , "Music player" , "Box of recordings" , "sealed plastic container" .)