Dog leads on rumbustious Yorkies, mine (8)
I believe the answer is:
colliery
'mine' is the definition.
(a colliery is a coal mine)
'dog leads on rumbustious yorkies' is the wordplay.
'dog' becomes 'collie' (collie is a kind of dog).
'leads on' says to take the initial letters (the letters which lead the words).
The first letters of 'rumbustious yorkies' is 'ry'.
'collie'+'ry'='COLLIERY'
(Other definitions for colliery that I've seen before include "Mining complex" , "Pit" , "Coal mine" , "Coalmine and surrounding buildings" , "Where a coalminer goes to work" .)