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In South Germany, sailors on Rhine perhaps delivering drink (11)

Ross

I believe the answer is:

screwdriver

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'drink' is the definition.
(I know this)

'in south germany sailors on rhine perhaps' is the wordplay.
'in south' becomes 's' (synonyms. I am not sure about the 'in' bit.).
'germany' becomes 'd' (vehicle registration code for Deutschland).
'sailors' becomes 'crew' (I've seen this in another clue).
'on' says to put letters next to each other.
'rhine perhaps' becomes 'river' (rhine is a kind of river).
'd' put after 'crew' is 'crewd'.
's'+'crewd'+'river'='SCREWDRIVER'

'delivering' acts as a link.

Can you help me to learn more?

(Other definitions for screwdriver that I've seen before include "Tool for turning fastening device" , "Cocktail (vodka and 4 down juice)" , "Cocktail of vodka and orange juice" , "Common tool" , "Tool used to tighten" .)

I've seen this clue in The Everyman puzzle in The Observer.
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