Squash blood under shoe (7)
I believe the answer is:
pumpkin
'squash' is the definition.
(pumpkin is a kind of squash)
'blood under shoe' is the wordplay.
'blood' becomes 'kin' (both can mean one's family).
'under' means one lot of letters go next to another (below, in a down clue).
'shoe' becomes 'pump' (pump is a kind of shoe).
'kin' after 'pump' is 'PUMPKIN'.
(Other definitions for pumpkin that I've seen before include "Large round fruit - coach for Cinderella?" , "Huge yellowy fruit" , "Large type of gourd" , "Halloween vegetable" , "Large orange fruit of the squash family" .)