2d) Learn fast about new university securing one brainbox (7)
4d) Abusing stringed instrument can end in twang (9)
15a) Greek character's fit working in plain clothes (5)
20a) Nothing managed to preserve good liver say (5)
25a) Rotten U.S. sequoia is lacking fluid (7)
Sorry for no letters. All help much appreciated.
Good morning and thank you for your prompt and informative answers. May I also please pick your brains on the following:
11a) Is it AWL or ALL
17a) Is it YANKS OR YONKS
Thanks in advance