Fan crossing street, European, for tie (6)
I believe the answer is:
fasten
'tie' is the definition.
(I've seen this before)
'fan crossing street european' is the wordplay.
'crossing' means one lot of letters goes inside another.
'street' becomes 'st'.
'european' becomes 'e' (abbreviation e.g. EU).
'st'+'e'='ste'
'fan' placed around 'ste' is 'FASTEN'.
'for' is the link.
(Other definitions for fasten that I've seen before include "Bolt" , "Tie or join together, fix firmly" , "Shut" , "Attach" , "Close, make secure" .)