Bringing up the rear? (7)
'bringing up the rear' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for last that I've seen before include "Continue" , "` `Let the cobbler stick to his ....' '" , "The cobbler's equipment will endure" , "` `The cobler should stick to his ....' '" , "Ultimate - endure" .)