No-frills airline intentionally like that (5)
I believe the answer is:
basic
'no-frills' is the definition.
(I've seen this before)
'airline intentionally like that' is the wordplay.
I cannot really see how this works, but
'airline' could be 'ba' (British Airways) and 'ba' is found within the answer.
'like' could be 'sic' (I've seen this before) and 'sic' is located in the answer.
This accounts for all the letters.
This explanation may well be incorrect...
Can you help me to learn more?
(Other definitions for basic that I've seen before include "Fundamental or rudimentary" , "Simple, unadorned" , "Fundamental, forming a starting point" , "Fundamental instruction's" , "Introductory" .)