Dash through Dixieland (4)
I believe the answer is:
elan
'dash' is the definition.
('elan' can be a synonym of 'dash')
'through dixieland' is the wordplay.
'through' says the answer is hidden in the clue.
'ELAN' can be found hidden inside 'dixieland'.
(Other definitions for elan that I've seen before include "Energy, style and enthusiasm" , "Dash and enthusiasm." , "Flair and dash" , "Vivacity, dash" , "French verve" .)