Provide nourishment for bear (7)
I believe the answer is:
sustain
I believe this clue is a double definition.
'provide nourishment' is the first definition.
(I've seen this before)
'for bear' is the second definition.
(I've seen this before)
(Other definitions for sustain that I've seen before include "Uphold, strengthen" , "Support, keep going" , "Keep alive" , "Strengthen; suffer" , "Nurture, uphold" .)