Around 1988 she joined the British branch of Save the Children. For her work she visited many of the worlds most poor and hopeless places, like Sri Lanka, Sierra Leone, Indonesia and Afghanistan.
The CCF hired Clark in January to manage its efforts to help Iraqi children as war loomed, but she wasn't able to enter the country till May. Part of her work was assessing the problems faced by Iraqis, checking how children were faring psychologically and deciding how to help.
On her death, CCF spokeswoman Ellie Whinnery told in an interview: "She strongly believes in what she does for children. She was very anxious to go to Iraq again, because she had been there before."