Help us to carry Calvin Klein footwear (5)
I believe the answer is:
socks
'footwear' is the definition.
(socks is a kind of footwear)
'help us to carry calvin klein' is the wordplay.
'help us' becomes 'sos' (distress message Save Our Souls).
'to carry' indicates putting letters inside.
'calvin klein' becomes 'ck' (this could be a standard abbreviation which I don't know about).
'sos' going around 'ck' is 'SOCKS'.
Can you help me to learn more?
(Other definitions for socks that I've seen before include "Dresses" , "Footwear - strikes" , "Hose" , "usually come in pairs" , "Short hosiery" .)