Worker using dog belonging to us with hesitation (8)
I believe the answer is:
labourer
'worker' is the definition.
(labourer is a kind of worker)
'dog belonging to us with hesitation' is the wordplay.
'dog' becomes 'lab' (short for labrador).
'belonging to us' becomes 'our' (I've seen this before).
'with' is a charade indicator (letters next to each other).
'hesitation' becomes 'er' (sound used when hesitating).
'lab'+'our'+'er'='LABOURER'
'using' acts as a link.
(Other definitions for labourer that I've seen before include "Farmhand" , "Navvy" , "Manual worker" , "Unskilled worker" , "One does heavy physical work" .)