I assume you mean hydraulics , ie the clutch slave cylinder. Although its bit of a grey area it would probably come under 'wear & tear' items
Reducing the fee is all about customer satisfaction & gaining some work out of it, its certainly not admitting liability.
Wear and tear=
Items that fail because of wear and tear are commonly excluded from used car warranties, leaving you vulnerable to declined claims.
Most warranties exclude ‘wear and tear’ items such as tyres, exhausts, catalysts, hoses, clutch friction plates and brake pads.
The reason is that claims could be almost limitless.