Stuck-up worker maybe packs eastern dress for empress (7)
I believe the answer is:
tsarina
'empress' is the definition.
(I've seen this before)
'stuck-up worker maybe packs eastern dress' is the wordplay.
'stuck up' says the letters should be written backwards.
'worker maybe' becomes 'ant' (worker is a type of ant).
'packs' means one lot of letters goes inside another (inserted letters are packed inside).
'eastern dress' becomes 'sari' (sari is a kind of dress. I am not sure about the 'eastern' bit.).
'ant' backwards is 'tna'.
'tna' going around 'sari' is 'TSARINA'.
'for' acts as a link.
Can you help me to learn more?
(Other definitions for tsarina that I've seen before include "companion of emperor" , "Catherine, say" , "Russian empress (S, not Z)" , "Nicholas's wife" , "Foreign ruler" .)