The best of Victorian England (5)
I believe the answer is:
prime
'the best' is the definition.
(I've seen this before)
'victorian england' is the wordplay.
'victorian' becomes 'prim' (synonyms).
'england' becomes 'E' (short for England).
'prim'+'e'='PRIME'
'of' acts as a link.
(Other definitions for prime that I've seen before include "Maybe eleven" , "At least two" , "Two for one" , "Main - charge" , "Of first quality" .)