Is a top from Lidl keeping cycling old lady at a constant temperature? (10)
I believe the answer is:
isothermal
'at a constant temperature?' is the definition.
I can't tell whether this defines the answer.
'is a top from lidl keeping cycling old lady' is the wordplay.
'a top from' says to take the initial letters.
'keeping' indicates putting letters inside (some letters kept inside).
'cycling' becomes 'other' (I am not sure about this - if you are sure you should give a lot more credence to this answer).
'old lady' becomes 'ma' (both can informally mean mother).
The first letter of 'lidl' is 'l'.
'is'+'l'='isl'
'other'+'ma'='otherma'
'isl' enclosing 'otherma' is 'ISOTHERMAL'.
Can you help me to learn more?
(Other definitions for isothermal that I've seen before include "without change in temperature?" , "at constant temperature" .)