Some new royal vessel? (4)
I believe the answer is:
ewer
'vessel?' is the definition.
(ewer is a kind of vessel)
'some new royal' is the wordplay.
'some new' becomes 'ewe' (I can't justify this - if you can you should believe this answer much more).
'royal' becomes 'r' (abbreviation).
'ewe'+'r'='EWER'
Can you help me to learn more?
(Other definitions for ewer that I've seen before include "A wide-mouthed water jug" , "from which liquid may be poured" , "A wide-mouthed water-jug" , "Large, wide-mouthed jug" , "Jug with wide spout" .)