E.g. pine to put on odd bits of bling that's unimpressive (3,4)
I believe the answer is:
big deal
'e g pine to' is the definition.
I can't judge whether this defines the answer.
'on odd bits of bling that's unimpressive' is the wordplay.
'on' means one lot of letters go next to another.
'odd bits of' indicates alternate letters.
'that's unimpressive' becomes 'deal' (I can't explain this - if you can you should give a lot more credence to this answer).
The alternating letters of 'bling' are 'big'.
'big' put next to 'deal' is 'BIG DEAL'.
'put' acts as a link.
Can you help me to learn more?
(Other definitions for big deal that I've seen before include "disparaging reply" , "doesn't impress me at all" , "Important transaction - so what!" , "Crucial stage of card game" , "In slang, I'm not impressed - by large wood?" .)