A thousand thanks, Huggles, 'twas doing my head in. I knew that lucky dips were originally stuffed in a box of sawdust. I guessed that the second word was tub (tab-teb-tib-tob...), but b_a_ had me baffled: boat, beat, bear, brat... only one letter off with brat...
The crossword is now complete.
I've never used this site before, & I'm pleasantly surprised that altruism still exists.
Welcome to the site Sea Devil ... you will find the vast majority of users only too pleased to offer guidance or solutions to any queries raised.
Just a suggestion - although for obvious reasons you have posted this request under the sub-section "crosswords", you will almost certainly receive a more rapid response if future queries are posted in the main Quizzes & Puzzles section. Most regular contributors prefer to concentrate their attention there.
Best wishes (S).