New arrangement for financing? It is irrelevant (13)
I believe the answer is:
insignificant
'irrelevant' is the definition.
(I've seen this before)
'new arrangement for financing? it is' is the wordplay.
'new arrangement for' is an anagram indicator (the letters arranged in a new way).
'it is' becomes 'itis'.
'financing'+'itis'='financingitis'
'financingitis' anagrammed gives 'INSIGNIFICANT'.
(Other definitions for insignificant that I've seen before include "Negligible" , "Too small to matter" , "Of no consequence" , "Trivial" , "Piddling" .)