Kind, that is Sally (6)
I believe the answer is:
sortie
'sally' is the definition.
('sortie' can be a synonym of 'sally')
'kind that is' is the wordplay.
'kind' becomes 'sort' ('sort' can be a synonym of 'kind'**).
'that is' becomes 'ie' ('i.e.' can be a synonym of 'that is').
'sort'+'ie'='SORTIE'
(Other definitions for sortie that I've seen before include "Operational flight by a bomber or fighter" , "Sally" , "Short trip; attack" , "(Siege) breakout" , "Sudden attack by besieged troops" .)