Commercial for Delta luggage case (5)
I believe the answer is:
addle
'commercial for delta luggage case' is the definition.
I can't judge whether this definition defines the answer.
'commercial for delta luggage case' is the wordplay.
'commercial' becomes 'ad' (abbreviation for advertisement).
'for' says to put letters next to each other.
'delta' becomes 'd' (phonetic alphabet: alpha, bravo, charlie etc.).
'case' suggests removing the centre.
'luggage' with its middle taken out is 'le'.
'ad'+'d'+'le'='ADDLE'
Can you help me to learn more?
(Other definitions for addle that I've seen before include "Like a bad egg" , "Get confused" , "(Of egg) become rotten" , "becomes muddled" , "Confuse; become rotten" .)