I would completely drain the system, both the brakes and clutch.
As the clutch shares the same reservoir.
Get a pressure bleeder too.
An assistant will help to keep an eye on the level and keep it topped up all the way through the process.
Air does and can get trapped.
I actually took my master cylinder off and clutch slave cylinder to check them just in case.
Rear nearside.
Rear offside.
Front nearside.
Front offside.
Then the clutch slave cylinder (by the oil filter).
Take your time and good luck.
PS- When the air bubbles stop don’t be tempted to accept that.
Do a few more pumps/pressure on each just in case.