Unsettled strike-breaker in Morecambe? (7)
I believe the answer is:
erratic
'unsettled' is the definition.
('erratic' can be similar in meaning to 'unsettled')
'strike-breaker in morecambe?' is the wordplay.
'strike-breaker' becomes 'rat' (I've seen this before).
'in' means one lot of letters goes inside another.
'morecambe?' becomes 'eric' (I've seen this in other clues).
'rat' going within 'eric' is 'ERRATIC'.
(Other definitions for erratic that I've seen before include "Variable" , "Eccentric, aberrant" , "Wayward" , "Irregular and unpredictable" , "Unpredictable; occasional" .)