Trump or head of state in the garden, perhaps (8)
I believe the answer is:
outdoors
'garden perhaps' is the definition.
Although both the answer and definition are singular nouns, I can't understand how they can define each other.
'trump or head of state' is the wordplay.
'trump' becomes 'outdo' ('outdo' can be a synonym of 'trump').
'head of' suggests taking the first letters.
The first letter of 'state' is 's'.
'outdo'+'or'+'s'='OUTDOORS'
'in the' is the link.
Can you help me to learn more?
(Other definitions for outdoors that I've seen before include "abroad" , "Alfresco" , "Al fresco" , "Not in a building" , "In the open air" .)