Just need a the last few answers - its getting late they're probably really obvious!
7d Bird with very big victim (?S?R?Y) 29d Recommend red ones again (?N?O???)-Endorse? 37d Attempt to support young bird (G???I?G) 42a Giving out pins with design fault (D???E???N?) 48d Winter Transport can kill they say (?L?I?H?) 52d Stick with 550 in light cylinder (??N?L?)
I only want to challenge one of those answers, 48d you say 'sleigh' which fits the clue, but the answer is 7 letters and 'sleigh' is only 6? - Unless RT have made an error?!
Cheers aftereight - I reckon we just need to add an 'S' to validate. Fortunately Transport covers both singular and plural words, although the clue is not particularly well worded.