Fish brought into pub: time to be rude (8)
I believe the answer is:
insolent
'be rude' is the definition.
(I've seen this before)
'fish brought into pub time' is the wordplay.
'fish' becomes 'sole' (sole is a kind of fish).
'brought into' is an insertion indicator.
'pub' becomes 'inn' (an inn is a type of pub).
'time' becomes 't' (abbreviation).
'sole' placed into 'inn' is 'insolen'.
'insolen'+'t'='INSOLENT'
'to' acts as a link.
(Other definitions for insolent that I've seen before include "Rude and disrespectful" , "Rude, showing lack of respect" , "Lippy" , "Extremely fresh" , "Being discourteous and insulting" .)