Put at risk, need Gran resettled (8)
I believe the answer is:
endanger
'put at risk' is the definition.
(I've seen this in another clue)
'need gran resettled' is the wordplay.
'resettled' indicates anagramming the letters (letters must be resettled in a new order).
'need'+'gran'='needgran'
'needgran' with letters rearranged gives 'ENDANGER'.
(Other definitions for endanger that I've seen before include "Hazard" , "To put one at risk" , "Jeopardize" , "Dan Green (anag.)" , "Put in peril" .)