Inquire about lab result on the cards (8)
I believe the answer is:
probable
'on the cards' is the definition.
(I've seen this before)
'inquire about lab result' is the wordplay.
'inquire' becomes 'probe' (I can't explain this - if you can you should believe this answer much more).
'about' indicates putting letters inside.
'result' indicates an anagram (I've seen 'result of' mean this).
'lab' is an anagram of 'abl'.
'probe' going around 'abl' is 'PROBABLE'.
Can you help me to learn more?
(Other definitions for probable that I've seen before include "Like to happen" , "Likely to happen but not certain" , "Likely to be the case" , "Seeming to have a good chance of happening" , "Person most likely" .)