To grab more, move faster than the other chap (5,2)
I believe the answer is:
'the other chap' is the definition.
Although both the answer and definition are verbs in their base form, I can't understand how one could define the other.
'to grab more move faster' is the wordplay.
I cannot quite understand how this works, but
'grab' could be 'catch' (synonyms) and 'catch' is present in the answer.
The remaining letters 'up' is a valid word which might be clued in a way I don't understand.
This may be the basis of the clue (or it may be nonsense).
'than' is the link.
Can you help me to learn more?
(Other definitions for catch up that I've seen before include "Lag no longer" , "Sauce" , "Draw level" , "Regain equality" , "Backward student must try to do this" .)