Over to the left, drawings by European (5)
I believe the answer is:
extra
'over' is the definition.
(extra can mean left over)
'the left drawings by european' is the wordplay.
'the left' shows that the letters should be reversed in order.
'drawings' becomes 'art' (I am not sure about this - if you are sure you should give a lot more credence to this answer).
'by' becomes 'x' (as in 'multiplied by').
'european' becomes 'E' (abbreviation e.g. EU).
'art'+'x'+'e'='artxe'
'artxe' back-to-front is 'EXTRA'.
'to' is the link.
Can you help me to learn more?
(Other definitions for extra that I've seen before include "Bit actor in crowd scene" , "There's more" , "Cricket run; unusually" , "more than required" , "Run scored but not off the bat" .)