Crossword Genius

Head's rested on this rugby ball perhaps -- that hurt! (6)

Ross

I believe the answer is:

pillow

I'm a little stuck... Click here to teach me more about this clue!

'head's rested on this rugby ball perhaps that hurt' is the definition.
The definition and answer can be both man-made objects as well as being singular nouns.
Perhaps there's a link between them I don't understand?

'ball perhaps that hurt' is the wordplay.
'ball perhaps' becomes 'pill' (humorous term for the ball in some sports. I am not sure about the 'perhaps' bit.).
'that hurt' becomes 'ow' (exclamation of pain).
'pill'+'ow'='PILLOW'

Can you help me to learn more?

(Other definitions for pillow that I've seen before include "Rest for the weary head" , "Item of bedding" , "place to lay his head" , "Bed cushion" , "Sleeper's cushion" .)

I've seen this clue in The Telegraph.
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