Expansion of Europe enraged gentler man (11)
I believe the answer is:
enlargement
'expansion' is the definition.
(I know that expansion can be written as enlargement)
'europe enraged gentler man' is the wordplay.
'europe' becomes 'E' (abbreviation eg in E number).
'enraged' indicates an anagram.
'gentler'+'man'='gentlerman'
'gentlerman' is an anagram of 'nlargement'.
'e'+'nlargement'='ENLARGEMENT'
'of' acts as a link.
(Other definitions for enlargement that I've seen before include "Blown-up photo" , "Bigger version of photographic print" , "increase" , "Blow-up photo" , "Blown-up picture" .)