Orders inside. The din is dreadful (7)
I believe the answer is:
noisome
'is dreadful' is the definition.
(thesaurus)
'orders inside the din' is the wordplay.
'orders' becomes 'om' (I am not sure about this - if you are sure you should believe this answer much more).
'inside' means one lot of letters goes inside another.
'the din' becomes 'noise' (a din is a noisy disturbance).
'om' put within 'noise' is 'NOISOME'.
Can you help me to learn more?
(Other definitions for noisome that I've seen before include "Odious" , "noxious smells" , "unhealthy" , "Foul-smelling - semi-Ono (anag)" , "Smelling bad" .)