Rum (European) on board the good ship Venus? (7)
I believe the answer is:
goddess
'venus?' is the definition.
(thesaurus)
'rum european on board the good ship' is the wordplay.
'rum' becomes 'odd' (I've seen this before**).
'european' becomes 'e' (abbreviation e.g. EU).
'on board' indicates putting letters inside.
'the good' becomes 'g' (abbreviation).
'ship' becomes 'ss'.
'odd'+'e'='odde'
'g'+'ss'='gss'
'odde' placed inside 'gss' is 'GODDESS'.
(Other definitions for goddess that I've seen before include "Female deity" , "divinity" , "Such as Venus" , "Eg, Aphrodite" , "Minerva, for example" .)