Catch girl with Oscar (5)
I believe the answer is:
lasso
'catch' is the definition.
(thesaurus)
'girl with oscar' is the wordplay.
'girl' becomes 'lass' (lass is a kind of girl**).
'with' says to put letters next to each other.
'oscar' becomes 'o' (phonetic alphabet: alpha, bravo, charlie etc.).
'lass'+'o'='LASSO'
(Other definitions for lasso that I've seen before include "Catch (steers) with a rope" , "Ling-nosed rope" , "Nosed rope" , "Rope with noose for catching animals" , "Long rope with running noose" .)