Fall to arrive with a farmer (4,1,7)
I believe the answer is:
come a cropper
'fall' is the definition.
(I've seen this before)
'arrive with a farmer' is the wordplay.
'arrive' becomes 'come' (coming is a kind of arriving).
'with' says to put letters next to each other.
'farmer' becomes 'cropper' (I can't justify this - if you can you should believe this answer much more).
'come'+'a'+'cropper'='COME A CROPPER'
'to' acts as a link.
Can you help me to learn more?
(Other definitions for come a cropper that I've seen before include "Fall heavily and unexpectedly" , "Fail badly" , "Suffer a defeat" , "Fail spectacularly" .)