Reclaim weird phenomenon (7)
I believe the answer is:
miracle
'phenomenon' is the definition.
(I've seen this before)
'reclaim weird' is the wordplay.
'weird' indicates an anagram.
'reclaim' with letters rearranged gives 'MIRACLE'.
(Other definitions for miracle that I've seen before include "Supernatural occurrence" , "Extraordinary event" , "Wonder, sign" , "Welcome event that's not explained by natural law" , "something amazing" .)