Crossword Genius

Father has pink gin, with no king visiting (7,2)

Ross

I believe the answer is:

popping in

I'm a little stuck... Click here to teach me more about this clue!

'visiting' is the definition.
The answer and definition can be both to do with motion as well as being present participle verbs.
Maybe you can see a link between them that I can't see?

'father has pink gin with no king' is the wordplay.
'father' becomes 'pop' (pop is a kind of father).
'has' says to put letters next to each other.
'with no' suggests deleting specific letters.
'king' becomes 'K' (abbreviation for king in chess).
'pink'+'gin'='pinkgin'
'pinkgin' with 'k' taken out is 'pingin'.
'pop'+'pingin'='POPPING IN'

Can you help me to learn more?

I've seen this clue in The Daily Express.
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