Direct reorganisation of Welsh factories (2,3,4,5)
I believe the answer is:
as the crow flies
'direct' is the definition.
(similar in meaning)
'reorganisation of welsh factories' is the wordplay.
'reorganisation of' indicates anagramming the letters (I've seen this in other clues).
'welsh'+'factories'='welshfactories'
'welshfactories' is an anagram of 'AS THE CROW FLIES'.
(Other definitions for as the crow flies that I've seen before include "Directly" , "By direct route" , "move in a straight line" , "without deviating" , "taking shortest route" .)