Under cover donors I changed (7)
I believe the answer is:
indoors
'under cover' is the definition.
(I've seen this before)
'donors i changed' is the wordplay.
'changed' indicates an anagram.
'donors'+'i'='donorsi'
'donorsi' is an anagram of 'INDOORS'.
(Other definitions for indoors that I've seen before include "Within a building" , "Covered" , "With a roof over one's head?" , "not the place for outsiders?" , "safe from the weather" .)