Fear you and I will get ahead of (3)
I believe the answer is:
awe
'fear' is the definition.
(awe is a kind of fear)
'you and i will get ahead of' is the wordplay.
'you and i' becomes 'we' (we means you and I).
'will get' becomes 'a' (I am not sure about this - if you are sure you should believe this answer much more).
'ahead of' says to put letters next to each other (some letters go in front of others).
'we' put after 'a' is 'AWE'.
Can you help me to learn more?
(Other definitions for awe that I've seen before include "Overwhelming admiration" , "Fearful respect" , "Reverential respect" , "Sense of wonder" , "Great wonder" .)