Times Jumbo Cryptic Crossword 1064.
Stuck on three; bottom right corner. 43ac. On time to pick up tyre that's been mended (7) R_T_E_D. Retread? How? 44d. request for job from university scholar I don't know!(4,3,2) _ _ N_ A_K _E. Don't ask me? If so, strange to see "don't" in clue and answer. 52d. Wise to empty pub. (2,2). _N _N.