An outing with Juliet, a relative (5)
I believe the answer is:
jaunt
'an outing' is the definition.
(I know that outing can be written as jaunt)
'with juliet a relative' is the wordplay.
'with' is a charade indicator (letters next to each other).
'juliet' becomes 'J' (phonetic alphabet: alpha, bravo, charlie etc.).
'a relative' becomes 'aunt' (aunt is a type of relative).
'j'+'aunt' is 'JAUNT'.
(Other definitions for jaunt that I've seen before include "Pleasurable trip" , "Outing" , "Pleasure trip" , "Short excursion for pleasure" , "Pleasure journey" .)