Have been following ST threads with great interest today - I am struggling also.
1 d Trifling in an amateur work, not very well (8)
D - - - A - L - Not sure of the A
22A Regularly issued arrest warrants, lacking initial restraint (9)
- - - - C - N -
and finally:
Sports car maker's lead-free vehicle (5)
O - - - N
All help greatly appreciated