Pleased one day to catch Australian runners cycling (6)

I believe the answer is:
amused
'pleased' is the definition.
(similar in meaning)
I can't explain the rest of the clue.
Can you help me to learn more?
(Other definitions for amused that I've seen before include "Beguiled" , "Delighted" , "Pleasantly occupied" , "Provoked mirth in" , "Mildly entertained by Medusa" .)
