Up the street, heard second person admit fellow, on reflection, is overwhelming, crushing everything in their path (8)
I believe the answer is:
tsunamis
'up the street heard second' is the definition.
I can't judge whether this defines the answer.
'person admit fellow on reflection is overwhelming crushing everything in their path' is the wordplay.
I cannot really understand how this works, but
'person' could be 'sun' (sun is a kind of person) and 'sun' is found in the answer.
'is' is present in the answer.
The remaining letters 'tam' is a valid word which might be clued in a way I don't see.
This explanation may well be incorrect...
Can you help me to learn more?
(Other definitions for tsunamis that I've seen before include "Destructive sea waves" , "Large ocean waves caused by underwater earthquakes" , "Huge destructive waves" , "Violent sea waves" , "catastrophes" .)