A Queen's wavy patterns in wardrobes (8)

I believe the answer is:

armoires

'wardrobes' is the definition.
(type of wardrobe)

'a queen's wavy patterns' is the wordplay.
'queen' becomes 'r' (abbreviation for regina, e.g. in ER ).
'wavy patterns' becomes 'moires' (large scale interference patterns).
'a'+'r'+'moires'='ARMOIRES'

'in' is the link.

(Another definition for armoires that I've seen is " cupboards".)

I've seen this clue in The Everyman puzzle in The Observer.

Want a hint initially instead of a full solution? Install my app