Tour abandoned by occupants reluctant to cross (8)
I believe the answer is:
traverse
'cross' is the definition.
('traverse' can be a synonym of 'cross')
'tour abandoned by occupants reluctant' is the wordplay.
'abandoned by occupants' says to hollow out the word (remove centre letters) (the inside letters are removed).
'reluctant' becomes 'averse' (I've seen this before).
'tour' with its middle removed is 'tr'.
'tr'+'averse'='TRAVERSE'
'to' is the link.
(Other definitions for traverse that I've seen before include "Cross sideways" , "In mountaineering, a steep slope to be crossed from side to side" , "Travel across or pass over" , "get across" , "Extend or bridge across" .)