first of all, if you don't have the glove yet, you DON'T GET THE MONKEY IN THE BOX YET.
2nd, to get monkey through the giant clock, you kill the emenies with the slingback
shooter, and go to the door next to the clock. it automatically opens if you're in front
of it. after that, you use the sky flyer to get to the opening at the left side that leads
to monkey behind the clock. you also hit the red button. and last but not least, to get
the monkey you see near the entracne at the left side, you just catch it like you always
do. then the door at the right will open.

I want to thank the person above for providing the gist of things - without their comment
I just couldn't figure it out !
Face the automatic door with the clock to the left of you.
Go through the door walking until the first wall is in front of you, turn to the lef(anti
clock wise) to face a different wall, the automatic doors are now to the left of you.
Jump up and use the flyer.
Enter the hidden room which is actually the back of the clock, hit the red button.
Go back ALL the way you came and swim into the bottom of the pool.

Once the whole Game is complete, you will get the boxing glove and can then go back and
open the 3 hidden spots (Crumbling Castle, TV Tower &Spector Factory)