Narrow-minded and silly idea with no point (11)
I believe the answer is:
opinionated
'narrow-minded' is the definition.
(similar in meaning)
'silly idea with no point' is the wordplay.
'silly' indicates an anagram.
'with' says to put letters next to each other.
'no'+'point'='nopoint'
'idea' after 'nopoint' is 'nopointidea'.
'nopointidea' with letters rearranged gives 'OPINIONATED'.
'and' is the link.
(Other definitions for opinionated that I've seen before include "Assertively dogmatic" , "Doctrinaire" , "Assertive in one's views" .)