2dn Cop in really striking clobber (4) I have R??T. RIOT and ROUT have been suggested but I don't see the parsing.
11ac Mast is buff and square (4) I have N?T?
FYI the third letter in 2dn is the second letter in 11ac.
All help appreciated.
11 Mast is the "fruit of forest trees like acorns and other nuts". It is also defined as "the fruit of trees such as beech, and other forms of Fagaceae"
a buff can be a person who knows a lot about and is very interested in a particular subject as can a nut (about a subject) + s(square)
Please excuse a very clumsy explanation.