Somewhat similar to Jo or Russell's show? (8)
I believe the answer is:
brandish
'show?' is the definition.
(thesaurus)
'somewhat similar' is the wordplay.
'somewhat' becomes 'brand' (I can't explain this - if you can you should believe this answer much more).
'similar' becomes 'ish' ('ish' can be similar in meaning to 'similar').
'brand'+'ish'='BRANDISH'
'to jo or russell's' 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.
(Other definitions for brandish that I've seen before include "Wave something about threateningly" , "shake" , "Wave like a weapon" , "Wave as a threat" , "Flourish aggressively" .)