What are the vacuum hoses for?
On most turbodiesel-engined cars, critical components such as turbocharger vanes, exhaust-gas recycling valves etc are controlled by vacuum systems (fed from the vac pump which also feeds the brake servo), and the hoses for these invariably do NOT have clips on them.
Providing the hoses are still flexible and pushed firmly onto their mounting spigots, it should be fine without them.
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