That clamp doesn't look so good, and neither does the pipe. The expensive fix is to take it to a muffler shop and have the rotten parts replaced. The cheaper fix starts with trying to tighten the clamp, and then if that doesn't work, a can and some hose clamps.

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Whoever said there's nothing more expensive than a cheap Mercedes never had a cheap Jaguar.

83 300D Turbo with manual conversion, early W126 vented front rotors and H4 headlights 401,xxx miles
08 Suzuki GSX-R600 M4 Slip-on 26,xxx miles
88 Jaguar XJS V12 94,xxx miles. Work in progress.
99 Mazda Miata 183,xxx miles.