Fall in ditch (4)

I believe the answer is:

drop

I believe this is a double definition.

'fall' is the first definition.
('drop' can be a synonym of 'fall')

'ditch' is the second definition.
(thesaurus)

'in' acts as a link.

(Other definitions for drop that I've seen before include "Decline - fall" , "Fall down after prod" , "Plunge" , "to omit the > smallest amount" , "Discontinue -- delivery" .)

I've seen this clue in The Telegraph and The Guardian.

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