Juliet stole whip from jockey (6)
I believe the answer is:
jostle
'jockey' is the definition.
(I've seen this before)
'juliet stole whip' is the wordplay.
'juliet' becomes 'J' (phonetic alphabet: alpha, bravo, charlie etc.).
'whip' indicates anagramming the letters (I've seen 'whipped' mean this).
'stole' with letters rearranged gives 'ostle'.
'j'+'ostle'='JOSTLE'
'from' acts as a link.
(Other definitions for jostle that I've seen before include "Barge" , "jockey" , "Bump and push (for position)" , "Push and elbow roughly in a crowd" , "Knock against" .)