Short brisk outing (5)
I believe the answer is:
jaunt
'outing' is the definition.
(synonyms)
'short brisk' is the wordplay.
'short' means to remove the last letter.
'brisk' becomes 'jaunty'.
'jaunty' with its final letter taken away is 'JAUNT'.
(Other definitions for jaunt that I've seen before include "Pleasure trip" , "Pleasurable trip" , "Ramble - excursion" , "Pleasure journey" , "Outing" .)