They may be spoilt when flying (6)
I believe the answer is:
pilots
'they' is the definition.
Both the answer and definition are plural nouns.
Perhaps they are linked in a way I don't understand?
'spoilt when flying' is the wordplay.
'when flying' is an anagram indicator (letters fly around).
'spoilt' anagrammed gives 'PILOTS'.
'may be' is the link.
Can you help me to learn more?
(Other definitions for pilots that I've seen before include "They operate aircraft" , "Aviators and ships' guides" , "Airmen" , "They steer ships in and out of harbours" , "They fly planes or guide ships" .)