Getting clowns to pair is not too difficult. They all start out as males and get along well. Then someone becomes a lil bossier and turns into the female.
Getting them to pair is not usually a problem at all. Getting them to spawn is a little trickier.
Some people have clowns that spawn like clockwork every 6-8 weeks.
I always have clowns in my reef tanks going back over 30 years and have only been aware of egg laying a handful of times.
My wife has decided to try clownfish breeding as an early retirement plan (not holding my breath) but we set her up a rack of tanks and are now trying to find or make pairs of clowns.
But if you want to spawn you need to be smart.
Thankfully the majority of clowns available these days are aquacultured. But this also means that when you, or the previous clown pair owner, gets their pair of clowns - there is a good chance those clowns are closely related - If not from the same brood, from the same in-bred farming facility (not said derogatorily - just a fact).
We are trying to avoid this and are buying pairs of clowns from different breeders and splitting them up to mix-match, to try to end up with a little stronger genetics.
Dave B