Road hazard -- this is removed in Dorset resort (7)
I believe the answer is:
pothole
'road hazard' is the definition.
'pothole' can be an answer for 'hazard'. I'm not certain of the 'road' bit.
'this is removed in dorset resort' is the wordplay.
'removed' is a deletion indicator.
'in' is an insertion indicator.
'dorset resort' becomes 'poole' (I've seen this before).
'this' with 'is' taken out is 'th'.
'th' going within 'poole' is 'POTHOLE'.
Can you help me to learn more?
(Other definitions for pothole that I've seen before include "Hollow in road" , "Deep water-carved cave" , "Deep water-made cave, pit in road" , "Small pit in road surface" , "One may descend into it" .)