False alarm in the heist leads to conviction (5)
I believe the answer is:
faith
'conviction' is the definition.
(I've seen this in another clue)
'false alarm in the heist leads' is the wordplay.
'leads' says to take the initial letters.
The first letters of 'false alarm in the heist' is 'FAITH'.
'to' is the link.
(Other definitions for faith that I've seen before include "Staunch trust" , "religion" , "Unshakeable belief" , "Strong belief in a supernatural power" , "Total trust" .)