Military detachment touring Finland’s capital, needing more exercise (5)
I believe the answer is:
unfit
'more exercise' is the definition.
Although both the answer and definition are verbs in their base form, I cannot see how one could define the other.
'military detachment touring finland's capital' is the wordplay.
'military detachment' becomes 'unit' (I've seen this in another clue).
'touring' is an insertion indicator (touring can mean going round).
'capital' indicates taking the first letters.
The initial letter of 'finland' is 'f'.
'unit' going around 'f' is 'UNFIT'.
'needing' acts as a link.
Can you help me to learn more?
(Other definitions for unfit that I've seen before include "Inapt" , "not worthy" , "Ill-equipped" , "Incompetent" , "struggling to keep up?" .)