Help Please

[DSJ]

Stuck in one corner. Help please.

1. Only a limited response (3,7)
?R? ??????E

2. An Australian father's althlete (6)
E????E

3. Short axe with long blade (7)
F????E?

4. An Australian race (5)
I????

5. Secured to prevent access (5)
?O?EY

Thanks in advance.

[DSJ]

Please help me with these. I have been struggling all evening, have solved most of the difficult clues, but am stuck with these. The penny just isn't dropping!