Tolerate a president pinching bottom (5)
I believe the answer is:
abide
'tolerate' is the definition.
(synonyms)
'a president pinching bottom' is the wordplay.
'a president' becomes 'Abe' (Abraham (Abe) Lincoln).
'pinching' is an insertion indicator (taking inside).
'bottom' becomes 'id' (I can't explain this - if you can you should believe this answer much more).
'abe' enclosing 'id' is 'ABIDE'.
Can you help me to learn more?
(Other definitions for abide that I've seen before include "Tolerate - dwell" , "Remain - tolerate" , "live in the past?" , "Tolerate; live" , "Wait for" .)