1: Got excited by unusual tulip (3,2)
3: I'm ready to attend university without preparation (9)
6: Sister gets nothing, we hear (3)
8: Flatters some mushy TV shows (4-5)
11: Gaunt crone leaning finally on a hollow redwood (7)
12: British actor in Rocky VII role (7)
14: No hot tamale in this dish (7)
15: Dear one separates two cored fruit (7)
16: Like a big cat, snaky fish consumes Spanish toddler (7)
18: Almost useless nags (7)
20: Settler-constructed bridge (7)
21: Edits Russian performances (7)
22: A contractor builds or he rents (9)
23: Without it, set call for recompense (3)
24: Timely introduction of purifier into terribly poor air (9)
25: Marry large bumpkin (5)