Morbid person to pull up outside house (5)
I believe the answer is:
ghoul
'morbid person' is the definition.
'ghoul' can be an answer for 'person' (ghoul is a kind of person). I'm unsure of the 'morbid' bit.
'pull up outside house' is the wordplay.
'pull' becomes 'lug' (I've seen this in another clue).
'up' shows that the letters should be reversed in order (in down clue: letters go upwards).
'outside' means one lot of letters goes inside another (some letters go outside others).
'house' becomes 'ho' (abbreviation for house).
'lug' back-to-front is 'gul'.
'gul' enclosing 'ho' is 'GHOUL'.
'to' is the link.
Can you help me to learn more?
(Other definitions for ghoul that I've seen before include "Spirit that robs graves and devours corpses" , "malevolent spirit" , "Corpse-loving phantom" , "Morbid voyeur" , "Macabre fiend" .)