Catch results in girl getting duck (5)
I believe the answer is:
lasso
'catch' is the definition.
(thesaurus)
'girl getting duck' is the wordplay.
'girl' becomes 'lass' (lass is a kind of girl**).
'getting' means one lot of letters go next to another.
'duck' becomes 'o'.
'lass'+'o'='LASSO'
'results in' is the link.
(Other definitions for lasso that I've seen before include "One may be caught by this" , "Cattle-catching rope" , "Long noosed rope used to catch animals" , "Catch (steers) with a rope" , "which may be catching" .)