Naked environmentalists test legal resumption of possession (2-5)
I believe the answer is:
re-entry
'legal resumption of possession' is the definition.
I can't tell whether this defines the answer.
'naked environmentalists test' is the wordplay.
'naked' indicates the central letters (outside letters removed so centre is unclothed).
'environmentalists' becomes 'greens' (members of the Green Party).
'test' becomes 'try' (synonyms).
The middle letters of 'greens' are 'reen'.
'reen'+'try'='RE-ENTRY'
Can you help me to learn more?
(Other definitions for re-entry that I've seen before include "A spacecraft's track coming back into atmosphere" , "Spacecraft's return phase" , "Return of a spacecraft to the earth's atmosphere" , "Hitting earth's atmosphere again" , "Return from outer space" .)