Looked around entrance to abbey frequented by spirits (7)
I believe the answer is:
haunted
'frequented by spirits' is the definition.
'haunted' can be an answer for 'frequented' (I've seen this before). I'm not sure about the 'by spirits' bit.
I cannot understand how the rest of the clue works.
Can you help me to learn more?
(Other definitions for haunted that I've seen before include "Possessed" , "tormented" , "Spooky" , "Worried" , "Beset by spirits" .)