Astronomer who took a notable part at the centre of things (6)
I believe the answer is:
hubble
'astronomer who took' is the definition.
'hubble' can be an answer for 'astronomer' (I've seen this before). I'm not certain of the remainder of the definition.
'a notable part at the centre of things' is the wordplay.
'a notable part at' becomes 'hu' (I can't explain this - if you can you should believe this answer much more).
'the centre of' means to look at the middle letters.
'things' becomes 'wobblers' (wobbler is a kind of thing).
The middle of 'wobblers' is 'bble'.
'hu'+'bble'='HUBBLE'
Can you help me to learn more?
(Other definitions for hubble that I've seen before include "Space telescope - American astronomer" , "Astronomer; name of telescope" , "[LAWMAKER] ?" , "Hookah" , "scientist" .)