Rob takes tour on Sunday (5)
I believe the answer is:
strip
'rob' is the definition.
(thesaurus)
'tour on sunday' is the wordplay.
'tour' becomes 'trip' (I've seen this in other clues).
'on' says to put letters next to each other.
'sunday' becomes 's'.
'trip' put after 's' is 'STRIP'.
'takes' acts as a link.
(Other definitions for strip that I've seen before include "Undress - maybe comic!" , "Undress (provocatively)" , "Remove clothes, just a sliver" , "Tear off" , "Lay bare" .)