Old taxman visiting Amsterdam at the weekend (7)
I believe the answer is:
matthew
'old taxman' is the definition.
(Jesus' disciple Matthew was a tax collector)
'visiting amsterdam at the weekend' is the wordplay.
'visiting' indicates a hidden word (the answer 'visits' the inside of the clue).
'MATTHEW' can be found hidden inside 'amsterdam at the weekend'.
(Other definitions for matthew that I've seen before include "Arnold, for example" , "Apostle to whom the first Gospel is ascribed" , "Religious author" , "Good writer" , "He's a saint" .)