Brussels politician carried in rescue boat rides here (5,4)
I believe the answer is:
theme park
'rides here' is the definition.
(a theme park might have rides)
'brussels politician carried in rescue boat' is the wordplay.
'brussels politician' becomes 'MEP' (Member of the European Parliament).
'carried in' means one lot of letters goes inside another.
'rescue boat' becomes 'the ark' (Noah's Ark).
'mep' inserted into 'theark' is 'THEME PARK'.
(Other definitions for theme park that I've seen before include "Eg, Alton Towers" , "Subject-based leisure attraction" , "number of day-trippers here" , "number of visitors here?" , "Area with rides, displays, etc" .)