Help with crossword

[aarcal]

Stuck with the following:

in which one may find a scientist or altar boy, possibly (10)

escapades breaking vet asunder (10)

rons gcse result leads to legislature in usa (8)

Thanks

[smartowl]

2. Adventures.
3. Congress.

[smartowl]

1. Laboratory.

[tyrepill]

1 Laboratory...anag "or altar boy"

[netkey]

laboratory
adventures (both are anagrams)

[aarcal]

thanks

2 more

person involved with screening a programme, or an unfortunate creditor? (8)

common criminal caught in some of the offences (5)

[tyrepill]

1 Director...anag "creditor"

[tyrepill]

2 of(FENCE)s

[aarcal]

thanks for all the help