Member of a left-wing group that governed Nicaragua during the 1980s (10)

'member' is the definition.
I know nothing about this answer so I can't tell whether this works.

'a left-wing group that governed nicaragua during the 1980s' is the wordplay.
I cannot really see how this works, but
'a' could be 'an' and 'an' is located in the answer.
'during' could be 'in' (e.g. during February means in February) and 'in' is found within the answer.
'the' could be 't' (the is pronounced as a 't' sound in some dialects) and 't' is found within the answer.
'1980s' could be 's' and 's' is found in the answer.
The remaining letters 'disa' 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).

'of' acts as a link.

Can you help me to learn more?