Baby's cot (6)
I believe the answer is:
cradle
'baby's cot' is the definition.
(I've seen this before)
This is all the clue.
(Other definitions for cradle that I've seen before include "One for rocking baby" , "Hold tenderly" , "The hand that rocks it rules the world, they say" , "Crib on rockers" , "early bed" .)