Dad staged riot - it’s old fashioned masculine, national pride (10)
I believe the answer is:
patriotism
'national pride' is the definition.
(I've seen this before)
'dad staged riot it's old fashioned masculine' is the wordplay.
'dad' becomes 'pa' ('pa' can be a synonym of 'dad').
'staged' is an anagram indicator ('staged' can mean 'organised').
'it's old fashioned' becomes 'tis' (I can't explain this - if you can you should believe this answer much more).
'masculine' becomes 'm'.
'riot' anagrammed gives 'trio'.
'pa'+'trio'+'tis'+'m'='PATRIOTISM'
(Other definitions for patriotism that I've seen before include "Love of country" , "national pride" , "dedication to the country" , "loyalty" , "support for state" .)