What is this cream-yellow flower?
New photos:
I think it's a Oenothera; possibly O. biennis or, if the OP is North America, O. pilosella. The elongated flower buds are good clue, plus what we can see of the flower, but the leaves are somewhat off for both species (closest to O. pilosella). A picture showing the entire plant from farther back would be nice to help confirm.