That man heads the Spanish list (4)
I believe the answer is:
heel
'list' is the definition.
(thesaurus)
'that man heads the spanish' is the wordplay.
'that man' becomes 'he' (**).
'heads' says to put letters next to each other (some letters go ahead of others).
'the spanish' becomes 'el'.
'he'+'el'='HEEL'
(Other definitions for heel that I've seen before include "Not the sole - scoundrel" , "horrible person" , "Despicable type" , "See 1 down" , "bank" .)