They travel from place to place seeking food and pasture (6)
I believe the answer is:
nomads
'they travel from place to place seeking food and pasture' is the definition.
(I've seen this before)
This is the entire clue.
(Other definitions for nomads that I've seen before include "Gypsies" , "Wandering people, roaming tribes" , "Travellers" , "Vagrant peoples" , "Damson for wandering tribes" .)