14a To the extent one can, ultimately, likes to secure a great deal (2,2,3,2) I? A? ??? ?S
16a Offender, extremely poor, one breaking into a group (7) C?L????
11d Press on to railway and bridge building (9) M?D?A???Y
54a Stagger endlessly on in surrounding area of rainforest? (9) A???O?I??