Relative at Christmas skimmed a bit of gravy, perhaps (7)
I believe the answer is:
granule
'a bit of gravy perhaps' is the definition.
I can't judge whether this definition defines the answer.
'relative at christmas skimmed' is the wordplay.
'relative' becomes 'gran' (short for grandmother).
'at' says to put letters next to each other.
'christmas' becomes 'yule' (Yule is the Christmas period).
'skimmed' means to remove the first letter (to skim something is to take the top off it).
'yule' with its first letter taken off is 'ule'.
'gran'+'ule'='GRANULE'
Can you help me to learn more?
(Other definitions for granule that I've seen before include "Piece of sugar or salt" , "Small compact particle" , "Small particle (of e.g. sugar)" , "Tiny bit of instant coffee or sugar?" , "Fine particle" .)