Cakes from Brussels retreats? (7)

I believe the answer is:

eclairs

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'cakes' is the definition.
(eclair is a type of cake)

'brussels retreats?' is the wordplay.
'brussels' becomes 'ec' (I am not sure about this - if you are sure you should believe this answer much more).
'retreats?' becomes 'lairs' (I've seen this in another clue).
'ec'+'lairs'='ECLAIRS'

'from' acts as a link.

Can you help me to learn more?

(Other definitions for eclairs that I've seen before include "Elongated cream puffs" , "sticky fingers" , "Oblong cream puffs" , "Oblong pastries" , "Cream cakes" .)

I've seen this clue in The Sun.

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