Loudly called Slough housing unfashionable (7)
I believe the answer is:
shouted
'loudly called' is the definition.
'shouted' can be an answer for 'called' ('shout' can be a synonym of 'call'). I am not certain of the 'loudly' bit.
'slough housing unfashionable' is the wordplay.
'slough' becomes 'shed' (both can mean to remove or lose).
'housing' is an insertion indicator.
'unfashionable' becomes 'out' (similar in meaning).
'shed' enclosing 'out' is 'SHOUTED'.
Can you help me to learn more?
(Other definitions for shouted that I've seen before include "spoke loudly" , "Yelled" .)