Gypsies and queens’ peculiar style (10)
I believe the answer is:
Here is my best explanation:
'style' is the definition.
'gypsies and queens' peculiar' is the wordplay.
'gypsies' becomes 'roma'.
'and' means one lot of letters go next to another.
'peculiar' indicates an anagram.
'queens' with letters rearranged gives 'nesque'.
(Another definition for romanesque that I've seen is "(In architecture) Norman".)