Suitable to steal (11)
I believe the answer is:
appropriate
I believe this is a double definition.
'suitable' is the first definition.
(similar in meaning)
'steal' is the second definition.
(I've seen this before)
'to' acts as a link.
(Other definitions for appropriate that I've seen before include "Material" , "Take; suitable" , "Steal - fitting" , "half-inch" , "nick" .)