Small team specially tasked to take the back off? (6)
I believe the answer is:
detail
I believe this is a double definition.
'small team specially tasked' is the first definition.
(small military group with a particular duty)
'take the back off?' is the second definition.
(to de-tail, to remove a tail)
'to' is the link.
(Other definitions for detail that I've seen before include "party" , "'Small part, particular (6)'" , "Specify" , "An individual item or element" , "Troop detachment; small feature" .)