Competition you're bound to enter? (5,6,4)
I believe the answer is:
three legged race
'you're bound to enter?' is the definition.
I can't judge whether this defines the answer.
'competition' is the wordplay.
I cannot really see how this works, but
'competition' could be 'race' (race is a kind of competition) and 'race' is found within the answer.
The remaining letters 'threelegged' 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?
(Another definition for three legged race that I've seen is " event".)