Almost grand, wearing community robe (9)
I believe the answer is:
nightgown
'robe' is the definition.
(I know that nightgown is a type of robe)
'almost grand wearing community' is the wordplay.
'almost' becomes 'nigh' (nigh can mean almost or nearly).
'grand' becomes 'g' (G is short for grand as in a thousand).
'wearing' indicates putting letters inside.
'community' becomes 'town' (town is a type of community).
'g' put inside 'town' is 'tgown'.
'nigh'+'tgown'='NIGHTGOWN'
(Other definitions for nightgown that I've seen before include "Sleeping garment" , "Dress for bed?" , "Garment worn in bed" , "Cover for retirement" , "Bedtime attire" .)