Tail us back to it and do the same (6,4)
I believe the answer is:
follow suit
'do the same' is the definition.
(I've seen this in another clue)
'tail us back to it' is the wordplay.
'tail' becomes 'follow' (I am not sure about this - if you are sure you should give a lot more credence to this answer).
'back' shows that the letters should be reversed in order.
'to' says to put letters next to each other.
'us' reversed gives 'su'.
'follow'+'su'+'it'='FOLLOW SUIT'
'and' acts as a link.
Can you help me to learn more?
(Other definitions for follow suit that I've seen before include "Be guided by corporation man" , "go from club to club" , "Do the same as someone else" , "in due course" , "Do as others do" .)