Dressed for a foray, we hear (7)
I believe the answer is:
arrayed
'dressed' is the definition.
(I've seen this in another clue)
'for a foray we hear' is the wordplay.
'for a' becomes 'ar' (I can't justify this - if you can you should believe this answer much more).
'foray' becomes 'raid' (synonyms).
'we hear' shows a homophone (sound like).
'raid' is a homophone of 'rayed'.
'ar'+'rayed'='ARRAYED'
Can you help me to learn more?
(Other definitions for arrayed that I've seen before include "Ordered" , "Formed up" , "Displayed in an arrangement" , "Decoratively assembled" , "Marshalled; (finely) dressed" .)