I used pushlock on my air system to isolate the compresssor from the iron pipe and to run a flex line to the hose reel from the iron pipe. It seals tight and no problems at pressures to 175 psi so far.
Dont use a clamp - slomoe is right, the hose needs to try to "blow off" to pull the inner chords tight and provide effective sealing of the inner tube against the fitting.
If you cut it off (BE VERY CAREFUL TO NOT KNICK THE BARBS ON THE BRASS FITTING). Also, make sure you push it on all the way to the yellow ring as tight as you can so that when it is pulled on it has plenty of inner tubing to collapse in the valleys behind the barbs.
I worked for a Gates hose and fittings distributor when I was in highschool and saw some pretty wild applications where this stuff was applied (and mis-applied)

It is good stuff when used in recommended applications.