The most common and most likely answer to this crossword clue is the 5 letter word DADDY
I've seen this crossword clue in The Daily Telegraph
D
A
D
D
Y
More clues leading to the result DADDY
- Wed, perhaps, without dread, vacuous PA
- Daughter, tot with yen for father
- Insect doggedly lands all over the shop
- Within 24 hours, theologian will be a father
- Theologian featured in Time is child’s father
- Fly’s relative, giant in the family?
- Top of the Pops?
- Pop star’s first to acquire position in field and fly
- Father may be cleric within 24 hours
- Insect family with extensive members
Buddy explains!

The straight part
We know that "Insect" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case insect = daddy.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 DADDY mean?
DADDY noun- (usually childish) Father.
- A male lover.
- An informal term of address for a man.
- A male juvenile delinquent in a reformatory who dominates the other inmates through threats and violence.
- To father; to sire.