For example, love to sit back with velvet cushions, ultimately puffed-up ones (8)
I believe the answer is:
egotists
'puffed-up ones' is the definition.
'for example love to sit back with velvet cushions ultimately' is the wordplay.
'for example' becomes 'eg' (short for 'exempli gratia', 'for example' in Latin).
'love' becomes 'o' (love means zero in tennis).
'to sit back with' becomes 'tis' (I can't explain this - if you can you should give a lot more credence to this answer).
'ultimately' suggests the final letters.
The last letters of 'velvet cushions' are 'ts'.
'eg'+'o'+'tis'+'ts'='EGOTISTS'
Can you help me to learn more?
(Other definitions for egotists that I've seen before include "People with exaggerated notions of their own importance" , "They have an exaggerated sense of their own importance" , "The selfish" , "Conceited and self-centered people" , "Self-centred self-seekers" .)