Muse about work, boring friends endlessly (8)
I believe the answer is:
calliope
'muse' is the definition.
(Calliope is an example)
'work boring friends endlessly' is the wordplay.
'work' becomes 'op' (short for opus).
'boring' means one lot of letters goes inside another (to bore something can mean to drill into it).
'friends endlessly' becomes 'callie' (I can't justify this - if you can you should believe this answer much more).
'op' placed within 'callie' is 'CALLIOPE'.
'about' acts as a link.
Can you help me to learn more?
(Other definitions for calliope that I've seen before include "inspiration for poets" , "something powered by steam" , "source of inspiration?" , "One of the Muses" , "Greek Muse of eloquence and epic poetry, or a kind of organ" .)