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? Strange if "don't" is in clue and answer. 52d Wise to empty pub (2,2) _N_N.
Many, many thanks to you all. Just got very confused.com!! Not the easiest puzzle methinks! No chance of winning anyway as I won Jumbo 1055 recently; after not doing so in the previous 1054!!! Thanks again.