Addition of a couple of guys around daytime (9)
I believe the answer is:
amendment
'addition' is the definition.
(thesaurus)
'a couple of guys around daytime' is the wordplay.
I cannot quite see how this works, but
'a' is within the answer.
'guys' could be 'men' (I've seen this in another clue) and 'men' is located in the answer.
This may be the basis of clue (or it may be nonsense).
'of' is the link.
Can you help me to learn more?
(Other definitions for amendment that I've seen before include "Change designed to improve a text" , "Statement added to or revising a document" , "A qualification" , "Minor improvement" , "Corrective treatment" .)