When on the alignment rack, the tech will often raise the car up to open up some clearance between the tire and the body. In cars like mine where the tire and wheel was chosen to fill up almost all of the space, this is the most easy way.
Also, if the bolts are tight but you're still hearing noise, it could be that the bushings are moving within the A-arms. Sometimes they are not an interference fit as required. Sometimes a crack forms and allows movement. In this case, a replacement A arm is needed or...you could put a few small tack welds from the bushing shell to the A arm.
