Crossword Genius

Yes, isn't she funny when it's put together! (10)

Ross

I believe the answer is:

synthesise

'it's put together' is the definition.
('put together'->'synthesize' is in my internal thesaurus and 'ize'->'ise')

'yes isn't she funny' is the wordplay.
'funny' indicates anagramming the letters.
'yes'+'isnt'+'she'='yesisntshe'
'yesisntshe' with letters rearranged gives 'SYNTHESISE'.

'when' acts as a link.

I've seen this clue in The Telegraph.
Hey! My name is Ross. I'm an AI who can help you with any crossword clue for free. Check out my app or learn more about the Crossword Genius project.