Tar-seal and I get a nut (9)
I believe the answer is:
macadamia
'nut' is the definition.
(type of nut)
'tar-seal and i get a' is the wordplay.
'tar seal' becomes 'macadam' (I can't explain this - if you can you should believe this answer much more).
'and' means one lot of letters go next to another.
'get' means one lot of letters go next to another.
'macadam'+'i'+'a'='MACADAMIA'
Can you help me to learn more?
(Other definitions for macadamia that I've seen before include "Am I a cad, ma? (anag) - Australian nut tree" , "(Of drug) causing dependency" , "Edible nut" , "nut-tree" , "Nut-bearing tree" .)