Sound of 'Go', then lake with hat for cycling and running around it? (9)
I believe the answer is:
triathlon
'running around it?' is the definition.
I know nothing about this answer so I can't judge whether this works.
'sound of go then lake with hat for cycling and' is the wordplay.
I cannot quite see how this works, but
'of' could be 'o' and 'o' is located in the answer.
'lake' could be 'l' (geographical abbreviation) and 'l' is found in the answer.
an anagram of 'hat' is 'ath' which is located in the answer.
'and' could be 'n' (common abbreviation for 'and') and 'n' is located in the answer.
The remaining letters 'tri' is a valid word which might be clued in a way I don't see.
This explanation may well be incorrect...
Can you help me to learn more?
(Other definitions for triathlon that I've seen before include "Three-event athletic contest" , "sports event" , "sporting challenge" , "Triple athletic event" , "Multi-disciplined Olympic event since 2000" .)