Last three please supply explanation!
11a. Jumper next to mine in shabby cinema (7). F?E???T
3d. At home, spinner for Middlesex initially playing his best (2,3,4) I? T?? ?O??
17a. Homestead a long way away? Miles (4). ?A??
Oops 4
15a. Project involving small fair (4). J?S?