Certainly no inflatable in difficulty (8)
I believe the answer is:
hardship
'difficulty' is the definition.
(hardship is a kind of difficulty)
'certainly no inflatable in' is the wordplay.
I cannot really understand how this works, but
'in' could be 'hip' (both can mean fashionable) and 'hip' is found in the answer.
The remaining letters 'hards' is a valid word which might be clued in a way I don't see.
This may be the basis of clue (or it may be nonsense).
(Other definitions for hardship that I've seen before include "Difficult circumstances" , "State of misfortune or affliction" , "Privation difficult to endure" , "Need" , "Adversity, misfortune" .)