From The Theatre to open-air adaptation? (9)
I believe the answer is:
operation
'from the theatre' is the definition.
I can't judge whether this definition defines the answer.
'to open-air adaptation?' is the wordplay.
'adaptation?' indicates an anagram (I've seen 'adaptation' mean this).
'to'+'open'+'air'='toopenair'
'toopenair' with letters rearranged gives 'OPERATION'.
Can you help me to learn more?
(Other definitions for operation that I've seen before include "Manoeuvre - military action" , "Procedure; enterprise" , "performance" , "Surgical or military procedure" , "military undertaking" .)