Hesitation in country (4)
I believe the answer is:
erin
'country' is the definition.
(I've seen this before)
'hesitation in' is the wordplay.
'hesitation' becomes 'er' (sound made while hesitating - um, er).
'er'+'in'='ERIN'
(Other definitions for erin that I've seen before include "Another name for 11 ac" , "Ireland (poet.)" , "Literary term for Ireland" , "country" , "The Emerald Isle, in poetry" .)