Upsetting experience, a tram crashing with you said to be inside (6)
I believe the answer is:
trauma
'upsetting experience' is the definition.
'trauma' can be an answer for 'experience' (I have seen 'Distressing experience ' mean 'trauma' so perhaps 'experience' could also mean 'trauma'). I'm not sure about the 'upsetting' bit.
'a tram crashing with you said to be inside' is the wordplay.
'crashing with' indicates an anagram.
'you said' becomes 'U' (homophone of 'you').
'to be inside' is an insertion indicator.
'tram' mixed up with 'u' makes 'truma'.
'a' placed inside 'truma' is 'TRAUMA'.
Can you help me to learn more?
(Other definitions for trauma that I've seen before include "Extreme shock" , "dreadful shock!" , "Bodily or mental injury" , "Deeply-upsetting shock" , "Physical or mental shock" .)