Torment Scotsman bored by island hotel (7)
I believe the answer is:
anguish
'torment' is the definition.
(synonyms)
'scotsman bored by island hotel' is the wordplay.
'scotsman' becomes 'angus' (I've seen this before).
'bored by' indicates putting letters inside (to bore something can mean to drill into it).
'island' becomes 'i' (geographical abbreviation).
'hotel' becomes 'h' (phonetic alphabet: alpha, bravo, charlie etc.).
'angus' enclosing 'i' is 'anguis'.
'anguis'+'h'='ANGUISH'
(Other definitions for anguish that I've seen before include "Great (mental) pain" , "Extreme mental distress" , "Severe mental suffering" , "extreme pain" , "Grief" .)