CLAW HAMMER (62A. Scratch the “2 Legit 2 Quit” rapper), HARBOR SEAL (10D. Protect the “Kiss From a Rose” singer from the cops?) and TICKLE PINK (28D. Amuse the “Get the Party Started” singer)? are the interrelated group of this eminently hummable Wednesday crossword. Other — AD-LIBBED (21A. Did improv), ELEMENTS