Carry ladder (3)
I believe the answer is:
run
I believe this clue is a double definition.
'carry' is the first definition.
(synonyms)
'ladder' is the second definition.
(both can mean a tear in tights)
(Other definitions for run that I've seen before include "Possibly an extra" , "Proceed quickly" , "Control" , "Enter a race" , "work" .)