Adjusts to new conditions (6)
I believe the answer is:
adapts
'adjusts to new conditions' is the definition.
(I've seen this before)
This is all the clue.
(Other definitions for adapts that I've seen before include "Changes to suit a new purpose" , "fashions" , "Alters to suit new conditions" , "Adjusts to new conditions" , "Changes to fit new circumstances" .)