Ladies perhaps welcoming good company image (4)
I believe the answer is:
logo
'company image' is the definition.
The answer and definition can be both related to communication as well as being singular nouns.
Perhaps you can see an association between them that I can't see?
'ladies perhaps welcoming good' is the wordplay.
'ladies perhaps' becomes 'loo' (I've seen this in other clues).
'welcoming' means one lot of letters goes inside another (in sense of 'inviting in').
'good' becomes 'g' (abbreviation).
'loo' going around 'g' is 'LOGO'.
Can you help me to learn more?
(Other definitions for logo that I've seen before include "Small emblem or device" , "Vigour; relish" , "Corporate emblem" , "Emblem, trade-mark" , "A company's printed symbol or emblem" .)