The most common and most likely answer to this crossword clue is the 6 letter word TIMING
I've seen this crossword clue in The Daily Telegraph
T
I
M
I
N
G
More clues leading to the result TIMING
- Comedic skill in it, I'm ingenious!
- Note Dynasty actor’s skill?
- Sign of being in form, it set up batting for century in MCG?
- Checking the duration of perverted sex on Dynasty
- Coordination can start to go around motorway
- A comedian should have this hat I’m in, gran admits
- Tango? Current male popular, having good co-ordination
- Couple of notes? No good comedian needs such
Buddy explains!

The straight part
We know that "A comedian should have this" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case a comedian should have this = timing.The cryptic/wordplay part
In cryptic crossword there's often an wordplay/cryptic part as well.This part involves a more complex hint, such as an anagram, homophone, hidden word, etc.
Sadly, We don't have an explanation for this specific crossword clue yet.
What does TIMING mean?
TIMING verb- To measure or record the time, duration, or rate of.
- To choose when something begins or how long it lasts.
- To keep or beat time; to proceed or move in time.
- To pass time; to delay.
- To regulate as to time; to accompany, or agree with, in time of movement.
- To measure, as in music or harmony.
- An occurrence or event.
- The regulation of the pace of e.g. an athletic race, the speed of an engine, the delivery of a joke, or the occurrence of a series of events.
- The time when something happens.
- The synchronization of the firing of the spark plugs in an internal combustion engine.
- An instance of recording the time of something.