Head of organisation seen after blast of wind showing enthusiasm (5)
I believe the answer is:
gusto
'enthusiasm' is the definition.
(I know that gusto is a type of enthusiasm)
'head of organisation seen after blast of wind' is the wordplay.
'head of' suggests taking the first letters.
'seen after' says to put letters next to each other.
'blast of wind' becomes 'gust' (I've seen this in another clue).
The initial letter of 'organisation' is 'o'.
'o' put after 'gust' is 'GUSTO'.
'showing' acts as a link.
(Other definitions for gusto that I've seen before include "Zest, great enjoyment in doing" , "Relish - zest" , "Verve, zest" , "Showing zest" , "Zest, pleasure in action" .)