Say nothing with Phi’s messy copy being tidied up (9)
I believe the answer is:
shipshape
'tidied up' is the definition.
(shipshape means tidy or organised)
'say nothing with phi's messy copy' is the wordplay.
'say nothing' becomes 'sh' ('sh' is said to tell someone to say nothing).
'with' indicates putting letters inside.
'messy' indicates an anagram.
'copy' becomes 'ape' (synonyms).
'phis' anagrammed gives 'hips'.
'sh' placed around 'hips' is 'shipsh'.
'shipsh'+'ape'='SHIPSHAPE'
'being' is the link.
(Other definitions for shipshape that I've seen before include "Exhibiting neatness" , "Neat and tidy" , "Neat and well-kept" , "Neat, orderly" , "Nautically neat" .)