Caused to go off the rails possibly days later (3,6)
I believe the answer is:
led astray
'caused to go off the rails' is the definition.
I can't tell whether this definition defines the answer.
'possibly days later' is the wordplay.
'possibly' indicates anagramming the letters.
'days'+'later'='dayslater'
'dayslater' is an anagram of 'LED ASTRAY'.
Can you help me to learn more?
(Other definitions for led astray that I've seen before include "taught bad habits" , "Caused to depart from the straight and narrow" , "Persuaded to take wrong course" , "Deceived" , "Caused to go in the wrong direction" .)