Reportedly in June or July, maybe, the sailor announced he'd fallen head over heels (10)
I believe the answer is:
somersault
This clue might be a double definition.
'reportedly in june or july maybe the sailor announced he'd fallen' is the first definition.
Although both the answer and definition are singular nouns, I cannot see how they can define each other.
'head over heels' is the second definition.
The definition and answer can be both acts as well as being singular nouns.
Perhaps there's an association between them I don't understand?
Can you help me to learn more?
(Other definitions for somersault that I've seen before include "Feat of acrobatics" , "policy switch" , "Perform acrobatic feat" , "Move acrobatically" , "Turn head over heels" .)