Awful miser welcomes blog entry by The Pretenders (9)
I believe the answer is:
imposters
'the pretenders' is the definition.
('imposter' can be a synonym of 'pretender')
'awful miser welcomes blog' is the wordplay.
'awful' indicates an anagram.
'welcomes' means one lot of letters goes inside another (in sense of 'invites in').
'blog' becomes 'post' (I am not sure about this - if you are sure you should give a lot more credence to this answer).
'miser' with letters rearranged gives 'imers'.
'imers' enclosing 'post' is 'IMPOSTERS'.
'entry by' acts as a link.
I am not very happy about this link. Some or all of it may belong to another bit of the clue.
Can you help me to learn more?
(Other definitions for imposters that I've seen before include "Fakes" , "They assume identities in order to deceive" .)