Fan outside set, somehow, for tie (6)
I believe the answer is:
fasten
'tie' is the definition.
(I've seen this before)
'fan outside set somehow' is the wordplay.
'outside' indicates putting letters inside.
'somehow' indicates an anagram.
'set' is an anagram of 'ste'.
'fan' enclosing 'ste' is 'FASTEN'.
'for' is the link.
(Other definitions for fasten that I've seen before include "Attach" , "Fix to, secure" , "Affix" , "Nail" , "Tie, secure" .)