Be inclined to help (4)
I believe the answer is:
tend
I believe this clue is a double definition.
'be inclined' is the first definition.
(synonyms)
'help' is the second definition.
(I know that attend is the is a more specific form of the action of tend.)
'to' acts as a link.
(Other definitions for tend that I've seen before include "Incline; cultivate" , "Incline - mind" , "Have inclination or care for" , "Look after (the sick)" , "Incline, lean" .)