Earl breaks upper leg cycling some distance up (6)
I believe the answer is:
height
'distance up' is the definition.
(I've seen this before)
'earl breaks upper leg cycling' is the wordplay.
'earl' becomes 'e'.
'breaks' means one lot of letters goes inside another (inserted letters break into the word).
'upper' becomes 'high' (similar in meaning).
'leg cycling' becomes 't' (I am not sure about this - if you are sure you should give a lot more credence to this answer).
'e' going within 'high' is 'heigh'.
'heigh'+'t'='HEIGHT'
'some' acts as a link.
Can you help me to learn more?
(Other definitions for height that I've seen before include "Dimension upwards" , "Rising ground; extreme example" , "Hill, elevation" , "size up?" , "Vertical extension" .)