Clearly uneasy when you take fewer breaks (8)
I believe the answer is:
restless
'clearly uneasy' is the definition.
'restless' can be an answer for 'uneasy' (synonyms). I am not sure about the 'clearly' bit.
'when you take fewer breaks' is the wordplay.
I cannot quite understand how this works, but
'when' could be 'e' (I've seen this in other clues) and 'e' is found in the answer.
'take' could be 'r' (abbreviation for 'recipe', Latin for 'take') and 'r' is located in the answer.
'fewer' could be 'less' (associated in meaning) and 'less' is found within the answer.
The remaining letters 'st' is a valid word which might be clued in a way I don't see.
This may be the basis of the clue (or it may be nonsense).
Can you help me to learn more?
(Other definitions for restless that I've seen before include "Constantly moving about or fidgeting" , "Not relaxed, unsettled" , "Uneasy and agitated" , "Uneasy, unable to relax" , "Unable to relax or be still" .)