With more detail, finding lead later, to make a deduction (5)
I believe the answer is:
infer
'make a deduction' is the definition.
(I've seen this in another clue)
I can't explain the remainder of the clue.
Can you help me to learn more?
(Other definitions for infer that I've seen before include "Take or gather meaning from" , "Conclude by reasoning" , "Draw meaning from" , "Imply" , "come to a conclusion" .)