The type of secret agents to cover Europe (7)
I believe the answer is:
species
'the type' is the definition.
(I've seen this before)
'secret agents to cover europe' is the wordplay.
'secret agents' becomes 'spies' (spy is a kind of secret agent).
'to cover' is an insertion indicator.
'europe' becomes 'ec'.
'spies' enclosing 'ec' is 'SPECIES'.
'of' acts as a link.
(Other definitions for species that I've seen before include "Biological group" , "Taxonomic grouping" , "Category" , "Kind of creature" , "Variety, taxonomic group" .)