Remains of crash scattered initially at retreats (7)
I believe the answer is:
ashrams
'retreats' is the definition.
(I've seen this before)
'remains of crash scattered initially' is the wordplay.
'remains of' becomes 'ash' (I can't explain this - if you can you should give a lot more credence to this answer).
'crash' becomes 'ram' (synonyms).
'initially' suggests taking the first letters.
The initial letter of 'scattered' is 's'.
'ash'+'ram'+'s'='ASHRAMS'
'at' acts as a link.
Can you help me to learn more?
(Other definitions for ashrams that I've seen before include "Hindu places of religious retreat" , "Retreats" .)