Passionate Olympic head receiving a watch (7)
I believe the answer is:
zealous
'passionate' is the definition.
(thesaurus)
'olympic head receiving a watch' is the wordplay.
'olympic head' becomes 'zeus' (I can't explain this - if you can you should believe this answer much more).
'receiving' indicates putting letters inside.
'watch' becomes 'lo' ('lo' is an archaic exclamation meaning 'look!').
'a'+'lo'='alo'
'zeus' placed around 'alo' is 'ZEALOUS'.
Can you help me to learn more?
(Other definitions for zealous that I've seen before include "Avidly enthusiastic" , "Ardently active" , "Extremely enthusiastic" , "Impassioned" , "Highly enthusiastic" .)