A rifle I'd misused where planes observed (8)
I believe the answer is:
airfield
'where planes observed' is the definition.
Although both the answer and definition are singular nouns, I cannot understand how one could define the other.
'a rifle i'd misused' is the wordplay.
'misused' is an anagram indicator.
'rifle'+'id'='rifleid'
'rifleid' anagrammed gives 'irfield'.
'a'+'irfield'='AIRFIELD'
Can you help me to learn more?
(Other definitions for airfield that I've seen before include "Where planes may land and take off" , "If derail? (Anag)" , "where flights are on offer" , "Aniseed aperitif" , "Landing strip" .)