I wondered about cover in retirement (9)
I believe the answer is:
eiderdown
'cover in retirement' is the definition.
'eiderdown' can be an answer for 'cover' (I've seen this before). I am not sure about the 'in retirement' bit.
'i wondered about' is the wordplay.
'about' indicates anagramming the letters.
'i'+'wondered'='iwondered'
'iwondered' is an anagram of 'EIDERDOWN'.
Can you help me to learn more?
(Other definitions for eiderdown that I've seen before include "What might keep one warm" , "Soft quilt filled with duck feathers" , "what ducks have to offer us" , "Warm bedcover" , "what may be on tonight" .)