In a way, it's nothing for me to be in a show (7)
I believe the answer is:
somehow
'in a way' is the definition.
(I've seen this in another clue)
'nothing for me to be in a show' is the wordplay.
'nothing' becomes 'O' (O resembles 0).
'for' means one lot of letters go next to another.
'to be in' means one lot of letters goes inside another.
'o'+'me'='ome'
'ome' going into 'show' is 'SOMEHOW'.
'it's' is the link.
(Other definitions for somehow that I've seen before include "One way or another" , "For some unspecified reason" , "In an unspecified manner" , "By unspecified means" , "For an unknown reason; so who, me? (anag.)" .)