Small fees regularly deducted for each returning commercial traveller (5,3)

I believe the answer is:

sales rep

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'each returning commercial traveller' is the definition.
I don't know anything about this answer so I can't judge whether it can be defined by this definition.

'small fees regularly deducted' is the wordplay.
'regularly' indicates alternate letters (regularly take one letter, leave next etc.).
'deducted' becomes 'rep' (I am not sure about this - if you are sure you should believe this answer much more).
'small'+'fees'='smallfees'
The alternate letters of 'smallfees' are 'sales'.
'sales'+'rep'='SALES REP'

'for' is the link.

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I've seen this clue in The Independent.

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