Friday's boy creates thrill (7)
I believe the answer is:
frisson
'thrill' is the definition.
('frisson' can be a synonym of 'thrill')
'friday's boy' is the wordplay.
'friday's' becomes 'fris' ('Fri' can be a synonym of 'friday').
'boy' becomes 'son' ('son' can be a synonym of 'boy'**).
'fris'+'son'='FRISSON'
'creates' is the link.
(Other definitions for frisson that I've seen before include "Shiver of excitement" , "Strong feeling of excitement, thrill" , "Kick" , "Emotional thrill" , "Shudder of excitement" .)