Where patient may be ahead (6)
I believe the answer is:
onward
'be ahead' is the definition.
(I've seen this before)
I don't understand the rest of the clue.
Can you help me to learn more?
(Other definitions for onward that I've seen before include "Going on, advancing" , "Direction to be taken by Christian soldiers?" , "Advance like Christian soldiers" , "Forward, like Christian soldiers" , "With advancing motion" .)