That's how it will be, because the estate is tied up (9)
I believe the answer is:
foretaste
'that's how it' is the definition.
I can't tell whether this definition defines the answer.
'will be because the estate is tied up' is the wordplay.
'will' says to put letters next to each other (I've seen this in other clues).
'be because' becomes 'for' (I've seen this before).
'is tied up' indicates anagramming the letters (letters get tied or tangled up).
'estate' with letters rearranged gives 'etaste'.
'for' put next to 'etaste' is 'FORETASTE'.
Can you help me to learn more?
(Other definitions for foretaste that I've seen before include "Sample of what's ahead" , "Appetiser" , "a sample of goodies to come?" , "Sample of something to come" , "Sampler" .)