Agitatedly press one for answer (8)
I believe the answer is:
response
'for answer' is the definition.
(synonyms)
'agitatedly press one' is the wordplay.
'agitatedly' indicates an anagram (I've seen this in other clues).
'press'+'one'='pressone'
'pressone' with letters rearranged gives 'RESPONSE'.
(Other definitions for response that I've seen before include "Answer - reaction" , "'Answer, reply (8)'" , "comeback" , "See porn (anag) -- answer" , "Preens so by way of answer" .)