_____ beaver (5)
![Ross](/clue/static/ross-mug.min.png)
I believe the answer is:
eager
'beaver' is the definition.
(thesaurus)
This is all the clue.
(Other definitions for eager that I've seen before include "Low platform" , "Whole-hearted" , "Impatient" , "Keen (as a beaver?)" , "Longing to see" .)