“The Iron Claw” (*** out of four) was a heartfelt biography of the Von Erich brothers (Zac Efron and Jeremy Allen White) who were groomed by their stern father (Holt McCallany) and became legends in the intense world of professional wrestling in the 1980’s. Compellingly and compassionately told with uniformly strong performances all around. Starts to lag a little in the midsection but regains its momentum for a strong and sincere finish. Chavo Guerrero (who plays The Sheik) also was film’s wrestling consultant.