He is trapped by company lease -- that's logical (8)
I believe the answer is:
coherent
'logical' is the definition.
('coherent' can be similar in meaning to 'logical')
'he is trapped by company lease' is the wordplay.
'is trapped by' means one lot of letters goes inside another.
'company' becomes 'co' (abbreviation).
'lease' becomes 'rent' ('rent' can be a synonym of 'lease').
'co'+'rent'='corent'
'he' going inside 'corent' is 'COHERENT'.
'that's' acts as a link.
(Other definitions for coherent that I've seen before include "Able to speak logically" , "Able to speak clearly" , "Intelligible and lucid" , "Not rambling in speech or reason" , "Sticking together" .)