Understand what result underpins program run (9)
I believe the answer is:
apprehend
'understand' is the definition.
(apprehending is a kind of understanding)
'what result underpins program run' is the wordplay.
I cannot really understand how this works, but
'what' could be 'eh' (sound used to ask 'what?' or 'pardon?') and 'eh' is found in the answer.
'result' could be 'end' (I've seen this in another clue) and 'end' is present in the answer.
'program' could be 'app' (type of computer program) and 'app' is found in the answer.
'run' could be 'r' (cricket abbreviation) and 'r' is found in the answer.
No letters remain.
This explanation may well be incorrect...
Can you help me to learn more?
(Other definitions for apprehend that I've seen before include "Fearfully anticipate" , "Go in fear" , "collar" , "Understand or arrest" , "Dread; capture" .)