Reticent (8)
'reticent' is the definition.
(similar in meaning)
This is the entire clue.
(Other definitions for taciturn that I've seen before include "Not inclined to conversation" , "Habitually uncommunicative, saying little" , "Without saying much" , "Disinclined to speak" , "withdrawn" .)
'reticent' is the definition.
(synonyms)
This is the entire clue.
(Other definitions for reserved that I've seen before include "without emotion" , "Reticent; put by" , "Booked in advance, being somewhat taciturn?" , "Taken" , "Slow to show emotions" .)