Bear I had trapped in Lincoln? (5)
I believe the answer is:
abide
'bear' is the definition.
(synonyms)
'i had trapped in lincoln?' is the wordplay.
'i had' becomes 'i'd' (contraction).
'trapped in' indicates putting letters inside.
'lincoln?' becomes 'abe' (Abraham Lincoln).
'id' placed within 'abe' is 'ABIDE'.
(Other definitions for abide that I've seen before include "Bear, endure" , "Tolerate; live" , "Remain - tolerate" , "Put up with" , "Endure, tolerate" .)