It's very doubtful that some crime will get you to heaven! (5)
I believe the answer is:
risky
'it's very doubtful' is the definition.
I can't judge whether this defines the answer.
'some crime will get you to heaven' is the wordplay.
'some' indicates the central letters.
'will get' means one lot of letters goes inside another.
'you' becomes 'r' (I can't justify this - if you can you should believe this answer much more).
'to heaven' becomes 'sky' (I've seen this in another clue).
The central letter of 'crime' is 'i'.
'r'+'sky'='rsky'
'i' going within 'rsky' is 'RISKY'.
'that' acts as a link.
Can you help me to learn more?
(Other definitions for risky that I've seen before include "not playing safe" , "taking a chance" , "Speculative" , "Hazardous" , "Chancy" .)