Moving along, aim for tree (8)
I believe the answer is:
magnolia
'tree' is the definition.
(magnolia is a kind of tree)
'moving along aim' is the wordplay.
'moving' indicates anagramming the letters.
'along'+'aim'='alongaim'
'alongaim' with letters rearranged gives 'MAGNOLIA'.
'for' acts as a link.
(Other definitions for magnolia that I've seen before include "ornamental tree" , "Spring-flowering shrub" , "Tree with creamy-white flowers" , "Fragrant blooms might strangely gain loam" , "Flowering tree; light pinkish white" .)