Caught young woman with dictionary (7)
I believe the answer is:
lassoed
'caught' is the definition.
(I've seen this before)
'young woman with dictionary' is the wordplay.
'young woman' becomes 'lass' (lass is a kind of young woman).
'with' means one lot of letters go next to another.
'dictionary' becomes 'oed' (Oxford English Dictionary).
'lass'+'oed'='LASSOED'
(Other definitions for lassoed that I've seen before include "as stock is restricted" , "Roped livestock with a noose" , "Caught with a rope" .)