Does one who masturbates during the daytime in Ramadan, and from whom a clear fluid is discharged before ejaculation, break his fast, and is this fluid considered mathy or manly?

The most likely understanding is that the clear fluid mentioned is madhi (pre-seminal fluid) and not mani (seminal fluid). Based on this, the fast is valid, because the emission of madhi during the daytime in Ramadan does not invalidate the fast. One must repent to Allah for masturbation, as it is forbidden in all circumstances.