Crossword Genius

Company that delivers positive experiences (3)

Ross

I believe the answer is:

ups

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

'experiences' is the definition.
The answer and definition can be both related to change as well as being verbs in their -s form.
Maybe you can see an association between them that I can't see?

'company that delivers positive' is the wordplay.
I cannot quite understand how this works, but
'positive' could be 'p' and 'p' is present in the answer.
The remaining letters 'us' is a valid word which might be clued in a way I don't understand.
This explanation may well be incorrect...

Can you help me to learn more?

(Other definitions for ups that I've seen before include "Periods of good fortune" , "Gains and losses - . . . and downs" , "peak times?" , "Highs" , "Increases (a level)" .)

I've seen this clue in The Times.
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