I wouldn't call that clawing, that's just a little droop because you got big heavy jurassic leaves hanging off 12 inch stems. With clawing you're gonna have a very aggressive curl at your leaf tips. You got a little fade, it's using up some nitrogen in the leaves....possible beginning of a MG deficiency, but I'd check runoff before tackling anything nute related. You might just need a flush. Considering the stage you are in flower I wouldn't be too worried.