Having difficulty fully parsing these clues:-
13 Down - "Right to get depressed in scrapes with leading astronomers". (STARGAZERS)
25 Across - "Tinker holding ale back for pirate".
(FREEBOOTER). That would appear to be "BEER"
reversed inside of "FOOTER" but I can find no reference of a tinker being referred to as a "FOOTER".
Also, I cannot see 19 Across, which is clued as:-
"Rabbit, noisily, just nibbled a bit on tuber".
For this I have 6 letters and -A-M-R towards it.