Posh editor got bigger! (7)
I believe the answer is:
swelled
'posh' is the definition.
Both the definition and answer are adjectives. Maybe you can see a link between them that I can't see?
'editor got bigger' is the wordplay.
I cannot quite see how this works, but
'editor' could be 'ed' (abbreviation) and 'ed' is located in the answer.
The remaining letters 'swell' is a valid word which might be clued in a way I don't understand.
This may be the basis of the clue (or it may be nonsense).
Can you help me to learn more?
(Other definitions for swelled that I've seen before include "Expanded" , "Inflated" , "Puffed up" .)