Book some travelling sweep (5)
I believe the answer is:
besom
'sweep' is the definition.
(I've seen this before)
'book some travelling' is the wordplay.
'book' becomes 'b' (abbreviation for book).
'travelling' is an anagram indicator.
'some' with letters rearranged gives 'esom'.
'b'+'esom'='BESOM'
(Other definitions for besom that I've seen before include "cleaner?" , "Twiggy broom" , "Concoction of twigs" , "Rustic broom" , "Twig broom" .)