Tatty cardi's discarded, Morris dancing anyhow in kind of dress (8)

I believe the answer is:
mourning
'tatty cardi's discarded morris' is the definition.
I can't tell whether this definition defines the answer.
'dancing anyhow in kind of dress' is the wordplay.
'dancing anyhow' becomes 'u' (I can't justify this - if you can you should give a lot more credence to this answer).
'in' indicates putting letters inside.
'kind of dress' becomes 'morning'.
'u' going inside 'morning' is 'MOURNING'.
Can you help me to learn more?
(Other definitions for mourning that I've seen before include "Feeling loss" , "Grieving" , "Sorrowing" , "wearing black" , "Black clothing" .)
