23a random, according to circumstances, 3 words, 3,3 and 4
??t ??? m???
14a old fashioned word for stamp collecting 10 letters, t?m??????r
Times 23,641
give corrdection to change ideas about public transport, 8 letters ??s?b?s?
18a greater numbers tuned up to welcome black comedian, 9 letters M?r?c???e
25a present as perfect, heading off to conceal an untuth about something unknown, 8 letters ?d???i?e