Becomes bored being interrupted by notice for lectures (7)
I believe the answer is:
tirades
'lectures' is the definition.
(a tirade is an angry rant or lecture)
'becomes bored being interrupted by notice' is the wordplay.
'becomes' becomes 'tir' (I am not sure about this - if you are sure you should give a lot more credence to this answer).
'bored' means to remove the middle letters (bore can mean to hollow out).
'being' becomes 'ens' (philosophical term for being or existence).
'interrupted by' indicates putting letters inside.
'notice' becomes 'ad' (both can mean an advertisement).
'ens' with its middle taken out is 'es'.
'tir'+'es'='tires'
'tires' placed around 'ad' is 'TIRADES'.
'for' acts as a link.
Can you help me to learn more?
(Other definitions for tirades that I've seen before include "Abusive words" , "Long angry speeches of criticism or accusation" , "stormy blasts" , "Denunciations" , "Speeches of violent denunciation" .)