Hi David,
7a - 4 letter "boatman" + 5 letter "bear"
29a - 6 letter "comic Dave" (see Jono's @15 and my '5) minus "start of ride" it's then "cycled" - this means that the clue can start in any cell but then continues normally until it reaches the end then goes back to the beginning and continues again
Both clues are themed.