Such orders can be sent to pals (6)
I believe the answer is:
postal
'such orders can be' is the definition.
I can't tell whether this defines the answer.
'sent to pals' is the wordplay.
'sent' indicates an anagram (send can mean to excite or stimulate).
'to'+'pals'='topals'
'topals' anagrammed gives 'POSTAL'.
Can you help me to learn more?
(Other definitions for postal that I've seen before include "Type of order" , "Relating to mail service" , "To do with snail mail" , "to go so mad in America" , "Sort of vote" .)