sunday times crossword 4486 22ac

[pq46]

A lot of money brought back from a period in US? looks like ?T?R
star? stir? I can't see it . . .

[bulliver]

stop (period = full stop in US) - 'pots' reversed

[robert551069]

7 across "Snappy session with son is a good laugh" ?H?O?
I think that the answer is WHOOP, but this does not seem to have anything to do with the phrase "Snappy session with son"

[Flyhalf]

Shoot (s for son + hoot); photo session known as a shoot.